asterisk users - Nov 2004 - optipoint400 + MOH

Hi all,
I have an optipoint 400 Sip phone with 2.46 sip image which stores its
music on hold file localy (on the phone) rather than indicate to the
server the call is on hold.

i'd like to have Moh play from the server, and i'm not sure if there
is a work around to achieve this

anyone else has the same phone and came across similar problems ??

thanks

fam