disconnect from SMPP

"Patrick Mignott" <[email protected]>
Newsgroups gmane.comp.mobile.kannel.devel
Message-ID <051d01c20d90$7424b690$0200a8c0@sysadmin> 
Hi all when ever i am not receiving SMS message from the SMPP i keep getting the below message, why? 
my keep alilve is set to 10 this should not happen... and ideas??

2002-06-06 19:30:23 [8] DEBUG: Started thread 9 (gw/bb_boxc.c:boxc_sender)
2002-06-06 19:30:53 [5] ERROR: SMPP: I/O error or other error. Re-connecting.
2002-06-06 19:31:23 [5] ERROR: SMPP: I/O error or other error. Re-connecting.
2002-06-06 19:31:53 [  5] ERROR: SMPP: I/O error or other error. Re-connecting.
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