Intelliprompt not working

I use the SyntaxEditor document header and footers to define the basic structure for a class in VB.

For example:

HeaderText:
Public Class MyClass
Public Sub Run()

FooterText:
End Sub
End Class


In the Syntax Editor, I type in something like:

Dim s as

And Intelliprompt will kick up for the type specification. Let's say I pick String. Then on the next line try to use my string, like so:

Dim s as String
s.

No Intelliprompt will show up. Regardless of what type I declare in the first line, it will not show up.

I catch the SyntaxEditorIntelliPromptMemberListPreFilter event. In the VBContext that is passed into the IntelliPromptMemberListPreFilterEventArgs, the Type comes in as 'None'.

Any Ideas?
I can send the full example if need be.