And in addition to what A_S said, post your full script.
EDIT: And an AvsMeter log of what you have in plugins might help too,
From command line, Make log in current directory. [latest avsmeter I have is v3.90]
Code:
Avsmeter -avsinfo -log
EDIT:
Atak_Snajpera,
I'm guessin' maybe MeGUI is the program in-use, [as its in a MeGUI thread, I too opened the post via Todays Posts quick link thing, so I did not notice was in a MeGUI thread either].