mail() and qmail

I have a linux box that is setup with qmail and I'm not having any luck getting messages sent via the mail() function. I'm not receiving any errors but it doesn't look like php is calling qmail because nothing is showing up in the logs. I linked qmail's sendmail wrapper to /usr/bin/sendmail, so I shouldn't have to change anything there. Thanks, Chris -- "They that would trade essential liberty for a little temporary safety deserve neither." -- Benjamin Franklin