Wireless problems after flashing new rom

[Guest myates]

Hi guys, sorry if this has been asked a hundred times already, I'm new!

Today I flashed a new rom onto my San Francisco, it's CyanogenMod 7 1.0. Anyway I think i did everything right but now my phone won't scan for wireless internet connections, or hold the information of my home wireless when I put it in.

Do any of you clever folk know how to sort this out? Or is there a better rom out there I can easily flash onto my phone that will be quicker/use less battery etc? This looks like the best place to ask all of these questions!

Thanks in advance