SQL 2005 Express - Remote Connection - Windows 2003 - MSKB 914277

Hey all!

I've tried all I know in an effort to get SQL 2005 Express to allow remote connections on my customer's 2K3 server and I'm not having any luck. I've followed MSKB 914277, including adding the exceptions to their Windows firewall...even disabled the firewall altogether (for testing purposes), and I still can't get remote clients to connect. As suggested by various other posts, I used netstat -an to confirm that SQL is listening on port 1433 for the desired IP on the server.....and saw that it is listening. Here's a snippet:

TCP 192.168.0.2:1433 0.0.0.0:0 LISTENING
TCP 192.168.0.2:1433 192.168.0.2:1738 ESTABLISHED
TCP 192.168.0.2:1738 192.168.0.2:1433 ESTABLISHED
TCP 127.0.0.1:1433 0.0.0.0:0 LISTENING

I can connect to the database locally (i.e. on the 2K3 server itself) using just the IP address .... tried with a DSN, UDL, ODBC, and SSMSE...all of which have no problems (as shown by the two, "ESTABLISHED" entries in the netstat results above which were from running SSMSE locally on the server at the time of the netstat). But if a remote computer on the network tries to connect, they cannot connect. Sorry, I don't have a copy of the error message the clients are getting yet.

I asked The customer's IT to confirm that the clients CAN can "see" the server (i.e. that there wasn't some kind of router or firewall blocking their path) and they sent me a copy of the server's pfirewall.log file. Here is an entry from the file that seems to show that client requests ARE getting to the server:

2007-12-17 19:12:13 OPEN-INBOUND TCP 192.168.0.4 192.168.0.2 1213 1433 - - - - - - - - -
2007-12-17 19:12:13 CLOSE TCP 192.168.0.2 192.168.0.4 1433 1213 - - - - - - - - -

I'm starting to get in over my head here (I'm a programmer, not a DBA or Net Admin), but doesn't the above suggest that an incoming request came in from .4 on port 1213 and attempted to connect to .2 on port 1433, but the connection was denied or dropped by the server? If so, why? Is this related to another MS KB I read about connection pooling? I'm way over my head here and could use some help. Did I miss something subtle during configuration of SQL Express?
Thanks in advance.