PHP timeout

Hi all I have a winXP machine on a network running IIS (PHP and MySQL is installed) I have recently moved from one machine to another and after setting up IIS and the rest and try to run few PHP scripts they just run forever or timeout. I believe the problem is with the security permission on ... somewhere, since I've been doing the same setup in several machines and it works fine (not in this network). Now, the funny thing is that most simple php script run fast after playing with the permissions but more complicating scripts or the phpMyAdmin just timesout. Does anyone know what the hell is going on? Mario