Cant start the app on a Terminal Server

Hey,

Im getting the following unexpected error while starting the application:

TargetInvocationException - Exception has been thrown by the target of an invocation.

at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at Devolutions.RemoteDesktopManager.Managers.UIManager.CreateMainForm()
at Devolutions.RemoteDesktopManager.Managers.UIManager.get_FrmMain()
at Devolutions.RemoteDesktopManager.Program.Main(String[] args)

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FileNotFoundException - Could not load file or assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Das System kann die angegebene Datei nicht finden.

at Devolutions.RemoteDesktopManager.Frames.ConnectionViews.FreConnectionDetails.FreConnectionDetails_VisibleChanged(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnVisibleChanged(EventArgs e)
at System.Windows.Forms.ScrollableControl.OnVisibleChanged(EventArgs e)
at System.Windows.Forms.Control.AssignParent(Control value)
at System.Windows.Forms.Control.ControlCollection.Add(Control value)
at Devolutions.RemoteDesktopManager.Decorators.DockingControlDecorator.AddDockPanelDetail(DockPanel dockPanel, ControlContainer container, String id, String name, FreConnectionDetails detailControl, ConnectionDetailMode connectionDetailMode, Image smallImage, Image largeImage)
at Devolutions.RemoteDesktopManager.Decorators.DockingControlDecorator.Initialize(DockManager dockManager, XtraTabControl navBarControl, ImageCollection smallImageList, ImageCollection largeImageList)
at Devolutions.RemoteDesktopManager.Forms.FrmMainRibbon.InitializeDecorators()
at Devolutions.RemoteDesktopManager.Forms.FrmMainRibbon.DoInitializeComponent()
at Devolutions.RemoteDesktopManager.Forms.FrmBaseRibbon.Initialize()
at Devolutions.RemoteDesktopManager.Forms.FrmBaseRibbon..ctor()
at Devolutions.RemoteDesktopManager.Forms.FrmMainRibbonBase..ctor()
at Devolutions.RemoteDesktopManager.Forms.FrmMainRibbon..ctor()

Can anyone help me?

Greets
edited by HWK on 11/23/2012