my /etc/procmailrc does not work

[vu pham]

First time I use procmail and it looks like I miss something.

My /etc/procmailrc is as follows :

[root at xen2vm1 etc]# cat procmailrc
0:c
! vu at sivell.com

but any emails to me on this system  is locally delivered to  me on this 
system only and never delivered to my office email. My sendmail.mc does 
include ostype(linux) which include FEATURE(local_procmail).
Any advice is greatly appreciated.

Thanks.
Vu