I'm trying trying to test MMS sending by using NMIT 4.0 (to create MMSs) and Nokia 3300 SDK (to view them). I create a very simple message (with only a text file, no smil). After sending to the SDK with the push button in the MMS Message Editor, the window in the 3300 SDK shows the error message:

Unknown Error Ind(x20,x44)

However, if use one of the example messages provided in the 'samples' folder, everything is OK, I can visualize the message.

What am I doing wrong?
Thanks for you help
Ramon Morros