mutt-qmail-procmail, cannot send mail

[dieter . maas]

i just subscribed to this list, since i need advice about
mutt. im new with it, just installed it, works, but
i cannot send messages, when i push this 'y' key, tells me:
s.th. like "failure child process aborted, 175 (or179?)
if this mail arrives, its been send via mailx-qmail
help would be very much appreciated, thanx
Dieter Maas