IIS 6.0 PHP Invalid access to memory location error

installed php 5.2.11 on windows 2003 IIS 6.0 (ISAPI)
encountred following error on phpinfo()
Invalid access to memory location

FIX:
check directory write permissions for following paths in php.ini
upload_tmp_dir="C:\Temp"
session.save_path="C:\Temp"
error_log="C:\temp\php-errors.log"
paths on your php.ini might be different