unknows errors with the mail() function

Hello, I have a php script that uses the mail function, and whenever I try to execute it I get an unknown error on the line that has the mail code.. ive checked the php.ini file and it looks fine ive checked the code over and over again and I don't see what is wrong, im hoping that someone out there might have had this same problem and found a solution to it... thanks mail($address, "Found Password", "$user - $found"); all the variables are set.. please, any info on this would be much welcome.