client.dll help

dnld the latest patch and then got this error(see attched scnsht) i have a
9800xt with the latest patches....xp pro sp 1(won't use sp2) i have never had
thes problem before...ever!...i used the knowledge base and made a
useropt.cfg(sp) file and added the 'fix' ..didn't work.pls help i want my
masks!!!!

Some people got it fixed by reinstalling audio and/or video drivers.
Others just by rebooting. I fixed mine by reinstalling DirectX. Try one
or all of those.