i used NDS for mms to create my mms message from SMIL files. however, when i want to include my video file in mms message, it occurs a problem and come out a dialog said " No media file specified" i don't know what is the problem.
here is my smil file look like:

<video src="Birthday.3gp"/>

it play well with real player but cannot convert into mms message.
can anyone help me? thank you.