asterisk users - Dec 2004 - Turning "*" Hangup off in queues

Hi ! 

Can somebody tell me how to turn the "*" Hangup option utrned off in 
queues. I have not used any H option but still as an agent if I press
"*"
key the user gets disconnected. Somehow it is turned on by 
default. Can I turn this option off ???? In my extensions.conf I have 
written :

exten => 8000,3,Queue(supportq|t)

plz help me inthis regard ... Thanks ! 

Usman.