ui Dialog在IE中运行一次

I hope someone can help with this problem. I am using ui Dialog that pops up on clicking a link with the same class. The problem is that the link work great once but if i click it again or another link with the same class then only the overlay loads but not the content box in IE only. It works great in firefox. My script includes an ajax post, if i remove the ajax code then the box works fine on every click.I hope someone can help with this problem. I am