#10 Cannot see Exchange 2K Server

[BW642]

I have a proxy server set up on a separate PC with IP
192.168.1.133. The Exchange Server is 192.168.1.2.
When I test the connection, the following message is
received:
Starting SMTP Server test...
In: 220 server.tracyind.com Microsoft ESMTP MAIL
Service, Version: 5.0.2195.6713 ready at Thu, 16 Sep
2004 15:50:28 -0700

Out: EHLO [192.168.1.133]
In: 250-server.tracyind.com Hello [192.168.1.133]
250-TURN
250-ATRN
250-SIZE
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-X-EXPS GSSAPI NTLM LOGIN
250-X-EXPS=LOGIN
250-AUTH GSSAPI NTLM LOGIN
250-AUTH=LOGIN
250-X-LINK2STATE
250-XEXCH50
250 OK

Out: MAIL FROM:<SMTPFilter@example.com>
In: 250 2.1.0 SMTPFilter@example.com....Sender OK

Out: QUIT
In: 221 2.0.0 server.tracyind.com Service closing
transmission channel

Cannot listen on Fluffy port 25
Fluffy will not guard your mail system until this is fixed.

Are there any settings that are not correct?

thank you for your help.