Association Request Failed--FINDSCU

[candy]

HI, I have a question about FINDSCU, In the command line ,I wrote:
findscu -v -P -k 0008,0052="IMAGE" -k 0010,0020="GE0514" -k 0020,000D="1.2.840.113674.514.212.200" -k 0020,000E="1.2.840.113674.514.212.82.300" -k 0008,0018="1.2.840.113674." localhost 104
I got the result:
Requesting Association
Association Request Failed:
0006:0321 Unrecognized PDU type: 48

I think the IP and the port are right. What 's wrong about that?
How to solve?Please tell me.

[Jörg Riesmeier]

I guess there is something wrong with the SCP (see DICOM part 8 for a list of valid PDU types).

[Marco Eichelberg]

An unrecognized PDU type is indeed a sign of something very wrong being received on the network connection - perhaps an encrypted connection, or a completely different protocol.