i am getting following error when i run ftdm start 1 what does this mean? freeswitch@billing> ftdm start 1 2011-05-20 16:10:23.637209 [INFO] ftmod_sangoma_ss7_main.c:1380 Starting span wp1:1. 2011-05-20 16:10:23.637209 [ERR] ftmod_sangoma_ss7_logger.c:87 sng_ss7-> date: 05/20/2011 time: 16:10:23 2011-05-20 16:10:23.637209 [ERR] ftmod_sangoma_ss7_logger.c:87 sng_ss7-> mtss(posix): sw error: ent: 001 inst: 000 proc id: 512 file: ../ss/ss_task.c line: 3477 errcode: 00515 errcls: ERRCLS_DEBUG errval: 00000 errdesc: Unknown task 2011-05-20 16:10:23.837205 [ERR] ftmod_sangoma_ss7_support.c:1772 Failed to get status of ISUP intf 1 2011-05-20 16:10:23.837205 [ERR] ftmod_sangoma_ss7_logger.c:87 sng_ss7-> date: 05/20/2011 time: 16:10:23 2011-05-20 16:10:23.837205 [ERR] ftmod_sangoma_ss7_logger.c:87 sng_ss7-> mtss(posix): sw error: ent: 001 inst: 000 proc id: 512 file: ../ss/ss_task.c line: 3477 errcode: 00515 errcls: ERRCLS_DEBUG errval: 00000 errdesc: Unknown task 2011-05-20 16:10:24.037197 [CRIT] ftmod_sangoma_ss7_cntrl.c:94 ISAP 1 Enable: NOT OK -ERR failure 2011-05-20 16:10:24.037197 [CRIT] ftmod_sangoma_ss7_main.c:1443 Failed to activate LibSngSS7!