domain change

Hello, just a quick (or so I hope) question:

Long story short, I had to change my domain. It was a pretty simple transfer – just a .com to .net thing – and my host transferred my entire site over for me. File structure and everything looks great when I check it via FTP.

I had/have WP installed on a subdomain. I can access the main index.html for my site just fine – so I know the transfer/DNS propagation/etc is all good – but I can’t access my subdomains (I have one for phpbb and one for wordpress).

I’ve been doing some reading, but I see a LOT of different suggestions on how to handle this. What is the easiest way to get my blog back up and running? I’m not well-versed in phpmyadmin or mysql, but I follow directions well ??

Thanks!