Firewall trouble shooting

Question

hi my laptop wont play runescape,every time i try when it gets to the looking for updates part the screen goes white and an error message appears here it is:

RuneScape was unable to connect to the update server. This is most likely caused by a firewall blocking the connection.
To resolve this:

If you have firewall or security software installed please ensure RuneScape/Java is allowed to open outgoing network connections on port 43594.
Note Windows XP Service Pack 2 has built in firewall software. If when loading RuneScape this asks if you want to allow the connection, you need to say 'yes'.
If that doesn't help then an external firewall may be causing the problem. Please ask your network adminstrator/ISP to open port 43594 for TCP traffic.

i know what your saying but the port thing doesnt work ive tried mant times and mant solutions but all have failed so if you can help please due so

--Thank You