Error creating window handle.

[venerable bede]

I use the following code to open a winform:

Dim abForm As New frmArchive()
abForm.MdiParent = Me
abForm.Show()

The problem I have is that when i run the code I get
" Error creating window handle."

I use the above 3 lines all the time and have never had problems in the past,

Any Ideas Anyone

Thanks in Advance