Help me fix this width issue please

[Divvy]

Hello my friends,

Can someone help me fix a little issue?
I have a chatbox installed in my forum that works perfectly on Firefox, but when I use Internet Explorer I got a little issue with the width and dont know how to fix that.

This is with Firefox:


And this with Internet Explorer:


This is my code:
http://paste2.org/p/1496413

Anyone?

[RobbieZ]

Did you ask Valter over at his modification thread, thats his mod!