Cannot create or read Setup Project

Hello,

1. I installed SharpDevelop 4.3. I opened a solution with a setup project and got the following error:

Error loading project.wixproj

The imported project "C:\Program Files (x86)\SharpDevelop\4.3\bin\Tools\Wix\wix.targets" was not found.

Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.

2. When I try to create a Setup Project I get the following excpetion:

SharpDevelop Version : 4.3
.NET Version         : 4.0
OS Version           : Microsoft Windows
Current culture      : English (United States) (en-US)
Running under WOW6432, processor architecture: x86-64


Exception thrown:
System.NullReferenceException: Object reference not set to an instance of an object.
   at ICSharpCode.SharpDevelop.Project.DotNetStartBehavior.ProjectCreationComplete()
   at ICSharpCode.SharpDevelop.Project.ProjectBehavior.ProjectCreationComplete()
   at ICSharpCode.SharpDevelop.Project.ProjectBehavior.ProjectCreationComplete()
   at ICSharpCode.SharpDevelop.Project.AbstractProject.ProjectCreationComplete()
   at ICSharpCode.SharpDevelop.Internal.Templates.ProjectDescriptor.CreateProject(ProjectCreateInformation projectCreateInformation, String defaultLanguage)
   at ICSharpCode.SharpDevelop.Internal.Templates.ProjectTemplate.CreateProject(ProjectCreateInformation projectCreateInformation)
   at ICSharpCode.SharpDevelop.Project.Dialogs.NewProjectDialog.CreateProject()
   at ICSharpCode.SharpDevelop.Project.Dialogs.NewProjectDialog.TryCreateProject(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.PerformClick()
   at System.Windows.Forms.Form.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
   at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
   at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
   at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)


What is missing? Any ideas?