rb433 passing a specific port.

I have an RB433 router. The router is set up as follows.

wlan1 192.168.2.x
eth1 static ip from internet provider
eth2 192.168.1.x

Here is the thing, all is setup with routing, nat and dhcp. I can connect and view everything fine. My problem is I am running a server on static ip 192.168.1.50 with a specific piece of software that all users need to connect to. I can see the server from the 2.x and 1.x network. The problem is the software when connecting from a client tries to do a discovery for port 6262 to the server. The 1.x network has no problem doing this but the 2.x network cannot accomplish this. Any suggestions on how to resolve this problem?

You say you use NAT? Maybe the example in this page can help you http://www.mikrotik.com/testdocs/ros/3.0/qos/nat.php (scroll down)