Subcategories not work

Hello. Can anyone help me?
Today saw http://fast-deal.com/index.php?main_...ndex&cPath=3_5

I don't know how to fix it...

What were you doing just before this error happened?

The page is loading only half-way, so there is a PHP error somewhere.

You were either loading some module, or editing some file.

Look in the CACHE folder for some recent error LOG FILES. open the most recent one and tell us what is there.

Thank you!
I fix problem.

Del thread,please.