Fisher (screen capture) problems

Nope, I never have those problems, but some people (at least 2 now) have.

What happened is, on their system, fisher can't see the screen. It seems fisher capture the first screen successfully (used to find the blubber), but later on when it tries to capture the screen, it got the same screen every time??!!

And one of the really good users is helping me to solve this, so far no luck. (besides been dead tired caring for babies over the weekend. Yep, when wife gets a party, who is the best to care for young kids? The only one that seems to be playing games!)