Net::SMTP troubleshooting

I am using Net::SMTP in a CGI program for feedback. I have two machines running Redhat 7.0, everything is fine on one, on the other problems. The short script:

use Net::SMTP;
$smtp=Net::SMTP->new(‘smtp.csulb.edu’,Debug=>1) || print “fail”;
$smtp->quit;

Results in a “fail”. (script works fine on other machine)
Net::SMTP _is_ installed (I successfully did make, make test, make install (as su) in libnet-… module)