SMTP Incoming -- Auth setting

[nycvoip]

Im attempting to use the incoming SMTP service in pagegate.. However, I receive and auth error when sending where do i setup the auth?
11/21/2008 3:17:38 AM <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
11/21/2008 3:17:38 AM < New SMTP Connection (1) Requested from 127.0.0.1
11/21/2008 3:17:38 AM > 220 sms.pixelrivertech.com PageGate SMTP Server Ready
11/21/2008 3:17:38 AM < EHLO prt-outofband
11/21/2008 3:17:38 AM > 250-sms.pixelrivertech.com welcomes prt-outofband (127.0.0.1)
11/21/2008 3:17:38 AM > 250-AUTH LOGIN PLAIN
11/21/2008 3:17:38 AM > 250 HELP
11/21/2008 3:17:38 AM < AUTH login c21z
11/21/2008 3:17:38 AM > 334 VXNlcm5hbWU6
11/21/2008 3:17:38 AM < c21z
11/21/2008 3:17:38 AM > 334 UGFzc3dvcmQ6
11/21/2008 3:17:38 AM - Connection Closed Gracefully.
11/21/2008 3:17:38 AM < SMTP Connection Disconnected

[Tech Support]

If you look in the HKEY_LOCAL_MACHINE\Software\NotePage\PageGate\ section of the registry, you should see an SMTP_Auth key. If it's set to 1, then Authentication is enabled. Setting it to 0 will disable it.