Cron cvs?

["J.D. Bronson" <jd_bronson%sbcglobal.net@localhost>]

I am trying to setup a root crontab to run cvs each sunday.

I just want to run this command:

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/usr/bin/cvs -q up -Pd | /usr/bin/mailx -s "CVS" root
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If i run it from command line (within /usr/src), it works.
Anytime I try to cron this, I get just an empty email and the job
only ran for 1sec.

Can someone point me as to what I need to do to cron this?
thanks!

-JD