Taken from Deepblue7. From fpsluke. This might solve it:
If you recieve a Small box with random characters (normally not readable at all) with only an OK box do this,
My Computer>Local Drive C:>Windows>System32>Drivers>ect>Host (Unknown File type)
Open the host file with Note Pad and paste the following 3 lines in the bottom
121.128.133.26 gwgt1.joymax.com
121.128.133.27 gwgt1.joymax.com
121.128.133.28 gwgt1.joymax.com
Should look like this....... Don't mind the otherlines just those 3 lines above
This is what i say

:
I hope u all get it to work
I'm dlin WoW 10 day trial

U don't need CCard to use it.. I hope its good i never played it before, just infished updating so for me, happy WoW'ing