this error is likely not related to a port opening/forwarding issue. Check your network configuration, possibly update your network drivers, rebooting, etc..., may fix the issue. Open your System.log and look for : "Error: connection to host '<NameOfHost>' failed (code = XX)" and tell me what number is "XX", maybe it'll give some hint at what's going on.
ManuTOO == Mana Games == >> I don't answer Private Message, except if it's really a _Private_ topic <<
I'm using now my notebook from a different wireless connection and different router and according to test, this router is able to ping...so there should be nothing wrong with my firewall, anti-virus and other computer stuffs..it must be something wrong the modem-router I have at home
Lucian it's the provider login(not for connection) with other information like personal settings and download limit,email etc. You received this personal password login from your provider since the first internet installation.
Look somewhere for internet options and add this port 4321 like I did and it will work.