MyBB Community Forums

Hi could you tell me plz how come i add my own goole add in Gadsp.php ??? where i've to edit ??
i download this mood from http://mods.mybboard.net/mods/forum-display .... i think gadsp.php meann Google Adsense Ads. on Forumdisplay..

But i couldnt put my add .. my forum link is www.hotbangali.com/fmybb