asterisk users - Jun 2009 - Could not stop autoservice on calling channel

Hi,

I always get this Error :

    -- <SIP/1002-09525960>AGI Script
/var/lib/asterisk/agi-bin/ast_staging/agi_answered completed,
returning -1
[Jun  2 21:38:17] ERROR[15299]: app_dial.c:1760 dial_exec_full: Could
not stop autoservice on calling channel

is anybody here get the same error, how to fix this ?

thanks

Niko