My system administrator has blocked port 6346( among otr ports) .... i cant connect using limewire or any otr file sharing soft ware for that matter ... pls advice ...

If you have Windows XP try this:
If you can't connect to the network, but are able to browse the internet, your firewall may be blocking the Gnutella port (default port is "6346"). The following programs are only a few popular brands of firewalls: Kerio Personal Firewall, McAfee Firewall, Norton Personal Firewall, SyGate Personal Firewall, Windows XP Internet Connection Firewall, ZoneAlarm Firewall. In order to connect to the network, you must configure your firewall to open a port for Gnutella. You can check instructions we've provided below for Windows XP Firewalls and Zone Alarm firewalls. You can also refer to the Microsoft page on configuring ports on Windows XP.

WINDOWS XP INTERNET CONNECTION FIREWALL:
Go to start -> Control Panel
Open Network Connections.
Right Click on the connection you use to connect to the network
Choose Properties
Go to the Advanced Tab
If your firewalled is Enabled go to step 8
If you want to enable Windows XP firewall check the box (this will enable the "settings" button. If you are not interested in enabling your Windows XP firewall, hit cancel -- LimeWire will not be affected.
Under Windows Firewall Options, Go to the Advanced Tab.
Select internet connection used. (Local area network or the name of your connection)
Hit the Setting Button.
Hit the "Add..." button.
In the description field add "Gnutella"
Set the IP address to "127.0.0.1"
Check the TCP Radio button
Set the external and internal ports to 6346
Hit OK
Repeat steps 9 to 13, except this time check the UDP radio button in step 12.
Make sure the list of services has two items listed Gnutella, and make sure they are both checked.
Click Ok

I have already tried this ... the thing is that the port 6364 has been blocked by my system administrator on the entire network ... not my computer alone.... i tried taking the www3.limewire.com:6364/ test but it said Connection Refused