asterisk users - Jan 2004 - X100P remote hangup detection problem

Hi

I'm having a problem with the X100P, where it doesn't detect the
caller hanging up before it has answered.  The result is that if the
caller hangs up just before asterisk answers the line, it still picks
up the line and records dialtone in my voice mail.  

Is there any way to fix this?  I'm in the UK, and I use opermode=1 when
loading wcfxo.


Cheers

Rob