vchkpw Hanging

I currently am running the latest version of qmail and vpopmail. Im running this script for pop3d:

#!/bin/sh
exec /usr/local/bin/tcpserver -H -R -v -c100 0 pop3 /var/qmail/bin/qmail-popup web1.dp.com /home/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir 2>&1

Now after everything is said and done, things seem to work. But then the server got really slow. I did a top, running Fedora Core 2, and noticed that vchkpw had atleast 5 different processes running sucking up at least 20% each process on cpu time. I kill it, then awhile later it comes up again.

What can I check to resolve this issue? I checked the qmail logs and the maillogs, everything is showing that it is working properly. No errors or anything. BTW vchkpw is showing running as root. Dunno if that is an issue.

Thanks
Silly