diff --git a/ethereal/assets/qml/wallet.qml b/ethereal/assets/qml/wallet.qml
index 81ad7ef24..f318ad173 100644
--- a/ethereal/assets/qml/wallet.qml
+++ b/ethereal/assets/qml/wallet.qml
@@ -505,7 +505,7 @@ ApplicationWindow {
 
 	}
 
-	Window {
+	ApplicationWindow {
 		id: debugWindow
 		visible: false
 		title: "Debugger"
@@ -543,36 +543,49 @@ ApplicationWindow {
 					orientation: Qt.Vertical
 					anchors.fill: parent
 
-          TableView {
-            property var memModel: ListModel {
-              id: memModel
-            }
-            height: parent.height/2
-            width: parent.width
-            TableViewColumn{ id:mnumColmn ; role: "num" ; title: "#" ; width: 50}
-            TableViewColumn{ role: "value" ; title: "Memory" ; width: 750}
-            model: memModel
-          }
+					TableView {
+						property var memModel: ListModel {
+							id: memModel
+						}
+						height: parent.height/2
+						width: parent.width
+						TableViewColumn{ id:mnumColmn ; role: "num" ; title: "#" ; width: 50}
+						TableViewColumn{ role: "value" ; title: "Memory" ; width: 750}
+						model: memModel
+					}
 
-          SplitView {
-            orientation: Qt.Horizontal
-            TableView {
-              property var debuggerLog: ListModel {
-                id: debuggerLog
-              }
-              TableViewColumn{ role: "value"; title: "Debug messages" }
-              model: debuggerLog
-            }
-            TableView {
-              property var stackModel: ListModel {
-                id: stackModel
-              }
-              height: parent.height/2
-              width: parent.width
-              TableViewColumn{ role: "value" ; title: "Stack"}
-              model: stackModel
-            }
-          }
+					SplitView {
+						orientation: Qt.Horizontal
+						TableView {
+							property var debuggerLog: ListModel {
+								id: debuggerLog
+							}
+							TableViewColumn{ role: "value"; title: "Debug messages" }
+							model: debuggerLog
+						}
+						TableView {
+							property var stackModel: ListModel {
+								id: stackModel
+							}
+							height: parent.height/2
+							width: parent.width
+							TableViewColumn{ role: "value" ; title: "Stack" ; width: parent.width }
+							model: stackModel
+						}
+					}
+				}
+			}
+		}
+		statusBar: StatusBar {
+			RowLayout {
+				anchors.fill: parent
+				Button {
+					property var enabled: true
+					id: debugNextButton
+					onClicked: {
+						ui.next()
+					}
+					text: "Next"
 				}
 			}
 		}
diff --git a/ethereal/assets/samplecoin/samplecoin.html b/ethereal/assets/samplecoin/samplecoin.html
index 3892141cd..e780aefb4 100644
--- a/ethereal/assets/samplecoin/samplecoin.html
+++ b/ethereal/assets/samplecoin/samplecoin.html
@@ -9,7 +9,7 @@
 
 <script type="text/javascript">
 
-var jefcoinAddr = "fc0a9436890478bb9b1c6ed7455c2535366f4a99"
+var jefcoinAddr = "518546ffa883dcc838a64bc2dabada0fd64af459"
 var mAddr = ""
 
 function createTransaction() {
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index 794786d97..64c739c15 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -130,7 +130,7 @@ func (gui *Gui) createWindow(comp qml.Object) *qml.Window {
 	gui.win = win
 	gui.uiLib.win = win
 
-	db := &Debugger{gui.win, make(chan bool)}
+	db := &Debugger{gui.win, make(chan bool), true}
 	gui.lib.Db = db
 	gui.uiLib.Db = db
 
diff --git a/ethereal/ui/ui_lib.go b/ethereal/ui/ui_lib.go
index 1c88b0181..51fa26a88 100644
--- a/ethereal/ui/ui_lib.go
+++ b/ethereal/ui/ui_lib.go
@@ -6,9 +6,7 @@ import (
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/go-ethereum/utils"
 	"github.com/go-qml/qml"
-	"github.com/obscuren/mutan"
 	"os"
 	"path"
 	"path/filepath"
@@ -121,27 +119,28 @@ func DefaultAssetPath() string {
 func (ui *UiLib) DebugTx(recipient, valueStr, gasStr, gasPriceStr, data string) {
 	state := ui.eth.BlockChain().CurrentBlock.State()
 
-	mainInput, _ := mutan.PreParse(data)
-	callerScript, err := utils.Compile(mainInput)
+	script, err := ethutil.Compile(data)
 	if err != nil {
 		ethutil.Config.Log.Debugln(err)
 
 		return
 	}
 
-	dis := ethchain.Disassemble(callerScript)
+	dis := ethchain.Disassemble(script)
 	ui.win.Root().Call("clearAsm")
 
 	for _, str := range dis {
 		ui.win.Root().Call("setAsm", str)
 	}
-	callerTx := ethchain.NewContractCreationTx(ethutil.Big(valueStr), ethutil.Big(gasStr), ethutil.Big(gasPriceStr), nil)
-
 	// Contract addr as test address
 	keyPair := ethutil.GetKeyRing().Get(0)
+	callerTx :=
+		ethchain.NewContractCreationTx(ethutil.Big(valueStr), ethutil.Big(gasStr), ethutil.Big(gasPriceStr), script)
+	callerTx.Sign(keyPair.PrivateKey)
+
 	account := ui.eth.StateManager().TransState().GetStateObject(keyPair.Address())
-	c := ethchain.MakeContract(callerTx, state)
-	callerClosure := ethchain.NewClosure(account, c, c.Script(), state, ethutil.Big(gasStr), ethutil.Big(gasPriceStr))
+	contract := ethchain.MakeContract(callerTx, state)
+	callerClosure := ethchain.NewClosure(account, contract, contract.Init(), state, ethutil.Big(gasStr), ethutil.Big(gasPriceStr))
 
 	block := ui.eth.BlockChain().CurrentBlock
 	vm := ethchain.NewVm(state, ui.eth.StateManager(), ethchain.RuntimeVars{
@@ -151,23 +150,28 @@ func (ui *UiLib) DebugTx(recipient, valueStr, gasStr, gasPriceStr, data string)
 		Coinbase:    block.Coinbase,
 		Time:        block.Time,
 		Diff:        block.Difficulty,
-		TxData:      nil,
 	})
 
+	ui.Db.done = false
 	go func() {
-		callerClosure.Call(vm, nil, ui.Db.halting)
+		callerClosure.Call(vm, contract.Init(), ui.Db.halting)
 
 		state.Reset()
+
+		ui.Db.done = true
 	}()
 }
 
 func (ui *UiLib) Next() {
-	ui.Db.Next()
+	if !ui.Db.done {
+		ui.Db.Next()
+	}
 }
 
 type Debugger struct {
-	win *qml.Window
-	N   chan bool
+	win  *qml.Window
+	N    chan bool
+	done bool
 }
 
 func (d *Debugger) halting(pc int, op ethchain.OpCode, mem *ethchain.Memory, stack *ethchain.Stack) {