virtual domain problem

[Eric Lalonde]

i have the domain yourmom.org pointed to my box. I want it to be set up as a
virtual domain.
i added the line [EMAIL PROTECTED]:yourmom
to /var/qmail/control/virtualdomains
and then created a user named yourmom.
in /home/yourmom/ i put a file called .qmail-testguy
then killall -HUP qmail-send

but when i send an email to [EMAIL PROTECTED]
i get:
delivery 37: failure: Sorry,_no_mailbox_here_by_that_name._

What am i doing wrong? am I supposed to add a user named testguy-yourmom and
give him a Mailbox? I thought testguy-yourmom's mailbox would be handled by
/home/yourmom/.qmail-testguy..or am I screwing up by leaving .qmail-testguy
empty?

thanks

eric