Error in Copying

I tried to copy something to the clipboard from SyntaxEditor and got the following message:

"The requested clipboard operation failed."

Here is the stacktrace:

at System.Windows.Forms.Clipboard.ThrowIfFailed(Int32 hr)
at System.Windows.Forms.Clipboard.SetDataObject(Object data, Boolean copy)
at ActiproSoftware.SyntaxEditor.Actions.CopyToClipboardAction.Execute(EditActionContext context)
at ActiproSoftware.SyntaxEditor.Document.ExecuteEditAction(EditAction action, Selection selection)
at ActiproSoftware.SyntaxEditor.Document.ExecuteEditAction(EditAction action)
at ActiproSoftware.SyntaxEditor.SyntaxEditor.ProcessCmdKey(Message& m, Keys keyData)
at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
at System.Windows.Forms.ThreadContext.System.Windows.Forms.UnsafeNativeMethods+IMsoComponent.FPreTranslateMessage(MSG& msg)
at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)\r\n at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)\r\n at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at msSQLed.Start.Main() in c:\\development\\mssqled\\mssqled\\start.cs:line 723

All I did was load a file, double click on some text to highlight it and then pressed Ctrl+C and got the above exception.

Thanks