Message ID issues

Hi,
 
I've noticed that one of the providers in an installation using kannel is
giving back big message ID's - see Bill error 2 below.. The provider is
using SMPP and using the msg id type 0x03, so hex is given in both the
submit_sm_resp and the deliver_sm. However I'm seeing problems where the
conversion of hex to string (with a bit of long integer mid way)... Below
you can see output from the logs, Ive put in 2 custom errors - bill error 1
is the tmp var (used in the dlr_add in the handle_pdu in the smpp smsc,
after conversion), and bill error 2 is the msg structure with the message
ie: pdu->u.submit_sm_resp.message_id, before conversion.
 
Has anyone ever seen this before?

2005-11-23 14:08:11 [13972] [39] DEBUG: SMPP[*****-fixed-primary]: BILL
ERROR1 2147483647
2005-11-23 14:08:11 [13972] [39] DEBUG: SMPP[*****-fixed-primary]: BILL
ERROR2 C2F75296041985B9