Browser displays PhP WAMPSERVER Configuration, not Blog Entry Page

I am using Wamp 2.2a (32-bit) and WP 3.4.1, self-hosted on a W7 64 bit machine. The WP directory is in \wamp\www\blog.

I have a registered hostame that resolves to the IP of my router. My router forwards HTTP requests to the Apache server. This part seems to be working just fine.

However, rather than serving the top page of my blog, Apache displays the WAMPSERVER Configuration page and the directories under \wamp\www.

In my various attempts to improve the security of my site, I’ve messed something up, because this used to work correctly. Unfortunately, I must have backed up my mistake, because the problem persists across restorations.

I’ve become gun-shy about editing files without some advice from those who know what they’re doing. So, anybody care to suggest what I need to do to fix this problem?

Thanks, in advance,

Michael