Hi,
please make sure that the path to your documents or to your apache installation doesn't contain any spaces or special chars because that could led to problems.
I'd suggest to install apache, php and other stuff into a separate directory like.
Apache -> c:\wamp\apache
php -> c:\wamp\php
MySQL -> c:\wamp\mysql
This is the way I did it and I never had any path problems by doing so 🙂
Thomas