Post-upgrade: Filters Not Running

I upgraded to the latest 3 version but my filters will not run. The correct information is there but when I click "Run" nothing happens. I tried creating a new filter (thinking it might be some sort of problem transferring the filter info) and it still didn't work. I noticed on this forum there is another user having problems with filters, but his seems to be a bit different. Also, do I have to set manual or automatic for each filter? My older version didn't have this. I prefer to run the filters occasionally to clean my inbox. I have all of the enable boxes unchecked so they don't run automatically. My operating system is Windows XP with the latest service pak, whatever that is. Any help any one can provide greatly appreciated.