[Ietab] Why I can't typing Thai (Th) in IETab.

Sun Nov 20 19:22:02 EST 2005

I'm using the latest firefox (1.5rc2) with your useful extension "IETab" 
I very like it but I get a big problem.
When I'm using IE mode I can't type Thai in any text box, I don't know why ?
According from this page "http://ietab.mozdev.org" because it not 
support Thai ?
If you have anything and I can help you please tell me.

I'm apologise about my english is not good.