Upgraded from 3.0 to 3.6 - Template crashes IE

[crucialjames]

I recently made an upgrade from 3.0 to 3.6.x and the upgrade went successful.

The old vbulletin style I actually had done for me its still enabled on the server and when I change templates it works fine in firefox but IE forumdisplay crashes on the old one. I had to recreate default template to get a working site for my IE users.

Does anyone have an idea why this would cause such a crash or is there is an easy way to copy the old style information over to the new.

any advice would be a plus, I appreciate it. I do have web design skills but for some reason this is a little harder than I thought.