Problem with execution external script

Hi, I've a problem with php and the execution of an external script. The script is adutil.vbs , belonging to the IIS administration Script on windows 2000 server. The vbs have to be execute with Cscript.exe. When I execute it from Dos shell there's no problems: for examples c:\Cscript adsutil.vbs But when I try to execute it from a php web page, using exec or system, directly or calling a C script, I've this error : Error Cscript: error loading...Access denied Example of direct execution from a php web page: <? echo system('%SYSTEMROOT%/system327cscript.exe adsutil.vbs'); ?> Example of execution calling a C script <? echo system('run_adsutil.exe'); //run_adsutil.exe is a C program that run the vbs with system() ?> Any Ideas? Anyone can help me? Thanks Bye