MMS probably rejected by MMSC

Hi,

I am sending the simple MMS, which I think is rejected by the MMSC... Can anybody look on the binary MMS body below and try to advice where the problem can be? Are there some mandatory http headers I might miss in the request?

[B]Headers:[/B]

[CODE]Accept: */*, application/vnd.wap.mms-message, application/vnd.wap.sic
Accept-Language: en-US
Connection: Keep-Alive
User-Agent: blah-blah[/CODE]

[B]MMS binary format:[/B]

[CODE]
8C8098543132656135353166313664008D928901819719EA2B3432303630383030303030302F545950453D504C4D4E00960EEA54616B2062657A2074656C6100840DB389746578742F706C61696E00010C070B838573616D706C650081F748656C6C6F2021[/CODE]


Thanks a lot for any tips.
BR
STeN

Although I do not know the protocol, it would be strange if it works without some type field.
Note that you can freely download the specification, just search for [b]3gpp mms[/b] with Google.