[Asterisk-Users] VoiceMail Not releasing

[ast at uc9.net]

About twice a week we have a caller that comes in and hangs up on 
voicemail.  We have 2 x100ps each with their own irq.  When the caller 
hangs up asterisk does not release the line.  The line rings busy,  
sometimes I can do a soft hangup Zap/1 and release the line sometimes I 
have stop asterisk and remove and re-insert the modules.

I am running RC1 on debian.

Is this a bug, or something I have setup wrong.