problem with Simplex theme

Hi everybody
I am using simple press forum in my blog with SimpleX theme, but some of the buttons of the forum are not working with this theme (but they are with default wordpress theme).

In simple press forum “forum” they have suggested me that maybe the problem is the jquery of the theme that is old.

I have commented the lines of the theme that called to the own theme jquery but it does not seem to be working.

I do not want to rebuild my site because it has been a lot of word to fit the shop, the content and the forum in one simple web, so…

…do you have any other suggestion?

thanks in advance and best regards.

Koxme