VNC doesn't work through Linksys - my setup is correct i think

[msledge@bellsouth.net]

i have vnc running on a windows 2003 server on my home network.  the internal ip address of this box at home is 192.168.1.10.  i did a standard install of the latest download of vnc server so it's listening on port 5900 while the java http server is listening on port 5800.  i have the windows firewall enabled on this network card and am allowing the following ports through (21/tcp, 80/tcp, 5800/tcp/udp, 5900/tcp/udp.  i have gone into my linsys firewall/router and have forwarded this exact list of ports to 192.168.1.10.

now, from work i can open up IE and hit the website on 192.168.1.10.  i just browse to my public ip address and the firewall/router forwards the port 80 traffic over to 192.168.1.10.  works great.

also from work i can pull up a command prompt and ftp to my ftp server on 192.168.1.10.  the firewall/router forwards the port 21 traffic over to 192.168.1.10.  works great.  i "put" a 160Mb file onto the ftp server from work and it worked great.

now, when i try to access vnc, i get an error.  it just hangs for a minute and then i get "unable to connect to host: Connection timed out (10060).  the java web client doesn't work either.  i know the server's up and running b/c i can web/ftp to it.  i know my router/firewall can forward ports b/c it's doing it with the port 80 and port 21 traffic.  i know vnc works b/c i can get to it both through the standard client and the web client when i am within my home network (192.168.1.x).  is there something else i have to enable on my router/firewall besides just simple port forwarding?  

i have a pretty good grasp of the basics here and as far as i can tell everything's setup properly.