Disable/Enable button with Internet Explorer

Disable/Enable button with Internet Explorer

Hello,
i'm new in using jquery, and new in using this forum :p
i've tried to search but i haven't found something useful about this...
I found a problem with using the ui button and internet explorer...i've a checkbox that is enabled and disabled by another button. This in firefox and chrome works fine, but in internet explorer don't go. The checkbox get disabled but when i try to reactivate it, don't works! It remains disabled...
There's someone that has solved this problem? How i can do it?
Or i'm doing something wrong?