play audio wav file while talking in an active call Problem on 81

Hi all,
I am succeed to play a audio file while on active call.
this is mycode

TThreadId aId;

RApaLsSession appArcSession;

User::LeaveIfError(appArcSession.Connect());

TInt theerr=appArcSession.StartDocument(iFileName,aId);

appArcSession.Close();

but it doesn't work only n81......
when i search on know issue they say that the solution is only http://wiki.forum.nokia.com/index.ph...tandalone_mode
the S60 music player can only be launched in embedded mode by using the Document Handler API (or) the AIW framework.

then i used CDocumentHandler api and the audio file plays at once only even though i manually changed music player setting i.e repeat song->on
Please hlep me if anyne knows about this.

Thank you,
sunil