when i am developing a mobile streaming server, why mobile client can not understand my sdp file? My mobile client is Nokia 6230.

Mobile Client (IP = 10.1.34.107):
- Send DESCRIBLE method.
Streaming Server response (IP = 10.1.10.3):
-
RTSP/1.0 200 OK
CSeq: 2
Content-type: application/sdp
Content-length: 206

v=0
o=streaming_test 1 123 IN IP4 10.1.10.3
s=ALO_TEST_HERE
i=audio test
c=IN IP4 10.1.34.107
t=0 0
m=audio 10002 RTP/AVP 108
a=range:npt=0-161
a=rtpmap:108 AMR/8000
a=control:tmp_control


Mobile Client (IP = 10.1.34.107):
- Error message display : "Unable to open file"

I don't know why mobile client can not understand my SDP file. Can you help me? thanks alot