Help on a weird subdomain redirect

whenever I add a redirect like test.php?prodid=12 it replaces the ? with %3f

I did a search, and it seems like there is a fix here: http://forums.cpanel.net/showthread.php?t=15176&highlight=%253f

It doesn't work for me though. I am putting it in the /home/user/public_html directory is that correct?

 

anyone know how to do this?