Not sure whats wrong

Hello to all
im a bit cinfused and im unsure of what i have done. However my problem is that gp4 is now running like a dog, at only about 15fps and with PO at up above 300 when only 2 days ago i was at 30+fps and always under or just over PO of 100, I have tweaked a lot using gp4edit and team editor and tweaker but unfortunately im not sure what would have made the change of performance. I have not changed the graphics setting in the game at all and as a result it should runt he same as 2 days ago. Anyway if anyone has an idea please respond

regards