[Serusers] Ringback tone

Folks, Sorry to bother you all with such a silly question, but I am facing some issues with ringback tones. I am using SJphones with SER. They work perfectly well, I can make calls to other extensions and talk. I am maintaining a list of valid users in a database table, and have a small module which checks the authennticity of the dialed extension when SER receives INVITEs, and if it is valid, the call is t_relayed to the called extension. My problem is when an extension is dialed, I cannot hear the ringing tone at the callers end. I searched on the archives, but could not find mails addressing such a problem. Obviously I am missing something here. Can anyone help? Thanks for your time... Regards, Girish __________________________________ Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs http://hotjobs.sweepstakes.yahoo.com/careermakeover