[SOLVED] Can not add or edit page

I just downloaded 3.5.3 and it was working just great. But, all of a sudden, I was not able to add or edit pages.

I down loaded and installed a fresh version of 3.5.3 but that did not help.

I switched back to the WP delfault theme and the add/edit function works just fine so it apprears to me that the problem is with this theme.

Please help.....

Thanks
Donna K.