Ok, to change your name you have to pm arunforce and ask. To change your avatar go to your user control panel and click edit avatar, from there open a new tab and find the image you want on google or if you made your own then skip this part. Now go to imageshack.us and upload your image as an avatar, this always works for me because I know what you mean about the error.
-Dave doesn't respond to pms
-PM me if I didn't explain it well, I'll explain again in PM