asterisk users - Jan 2010 - How to escape the Pound-Char in Callfiles

Hello,
I'm using Asterisk 1.6.2.0 and I like to call extension #8 from callfile. 
Unfortunately the #-char ist interpreted just as comment.
I got a "Invalid file contents in /var/spool/asterisk/outgoing/callfile, 
deleting" from asterisk.
When I try to escape with \ oder use quotes, I got: \#8,1 failed so falling 
back to exten 's' or "#8",1 failed so falling back to exten
's'


TIA,
Dominik