How to run limewire pro 4.14.8 behind ISA 2006 from my XP client PC?

This is the settings in the limewire pro 4.14.8:

On tools, options, I clicked on advanced then firewall config, there are two sections:
1- Listening port which is by default: 2883

2- Router configuration section with have 3 choices:

Use UPnP (recommended)
Manual port forward: 6346
Do nothing (not Recommended)

Also on tools, options, I clicked on proxy I choose http which is enable proxy where I typed 192.168.1.1 port 8080

I do not know what to do to have limewire working behind ISA, please someone help me to get right settings.

Regards
Roman