Ok so im fresh at this bitcoin idea. Got a guy to walk me through downloading what I needed, signed up to a pool and got everything I needed. However now I am stuck at the very last stage because when ever I run GUIMiner (latest version) I receive an error message saying No OpenCL devices found.

I am running a HIS HD 5870 with the latest 11.5 drivers and ATI Stream SDK installed.

Anyone else having this problem? Have tried complete uninstalls/reinstalls. Still no change.

System Info:

AMD 9950 BE 2.6 Quad Core (running at 3.0)
HIS HD 5870 - latest drivers
Windows xp 32bit sp2

Thanks for the help.