Sent SMS :Packet to short while unpacking MSg

Dear all

I observed the following error messages on the bearerbox if I sent a
SMS.
 
2002-11-29 09:39:05 [5] INFO: AT2[/dev/modem]: AT SMSC successfully
opened. 
2002-11-29 09:39:08 [4] DEBUG: Started thread 7 (gw/bb_boxc.c:function) 
2002-11-29 09:39:08 [7] INFO: Client connected from <127.0.0.1> 
2002-11-29 09:39:08 [7] DEBUG: Started thread 8
(gw/bb_boxc.c:boxc_sender) 
2002-11-29 09:41:31 [7] ERROR: Packet too short while unpacking Msg. 
2002-11-29 09:41:31 [7] ERROR: Msg packet was invalid. 
2002-11-29 09:41:31 [7] ERROR: Failed to unpack data!
 

I could sent messages with the same format and modem parameter before
but now I cannot.
Very strange.

Does anybody have an idea ?

Kind Regards

Joerg