Problem In SQL Server 2005 Replication On Port 2433

I have 2 SQL 2005 Servers SERVER1 and SERVER2 and want to establish a
replication betwwen them: SERVER1 as Publisher and SERVER2 as
subscriber.

the problem is that SERVER2 is runnint on port 2433 and -I dont know
why- I cannot switch it to port 1433.

When trying to push a new subscription on SERVER1 to SERVER2, it tells
that:

"Cannot connect to SERVER2,2433.

SQL Server replication requires the actual server name to make a
connection to the server. Connections through a server alias, IP
address, or any other alternate name are not supported. Specify the
actual server name, 'SERVER2'. (Replication.Utilities)"

So, I'd set an alias on SERVER1 for SERVER2 and this part of problem
resolved. subscription was estableished and It appeared under "SERVER1
> Replication > Local Publications > [publication name] " in
management studio.

But When trying to start synchronising, it fails with a mesage
indicating that it couldnot connect to SERVER2, and it seams that
SERVER1 trys to connect to SERVER2 on port 1433

also I tryed to publish SQL Server on Port 1433 using an ISA Server
Installed on SERVER2, but coud not configure it to work.

any solution on configuring either SQL Servers and/or ISA Server?