Flash Global Settings Manager not saving on MacBook

Hi, I have a problem with Flash. I recently tried to watch videos at The Escapist and was unable to. This has been happening since about Friday last week. I also have found that I am unable to play some flash games. I also found that I can't watch videos at Veoh. I tried to adjust my preferences in the Flash Global Settings Manager to accept third party cookies so that I can do these things.

It isn't working. The boxes won't check. Is anybody else having this problem? If so what did you do about it?

This problem only occurs on my MacBook. I am still able to do these things on a Windows xp desktop I have in the same house.