You might also want to read up on flags, you probably did something like -w256 -f60 but there are quite a few more, and it's usually great to know what they actually mean! Since they can tweak how you want to mine.
Info on it here.Edit: for a quick overview of all of them, check
hereThanks

I'll have a play with the settings. I'm getting 256Mh/s at the moment which is a hell of a lot more than I was getting before

I'll send a donation your way now [Edit] I can't see your address in signature or profile... pm me and I'll send on the donation
Cheers, just added one - I actually forgot to add one ^^ If you have any questions, feel free to ask - I am using a HD7970 running GUIMiner