connection problems

[ftinag]

1. OS version? (eg: Windows 98) Win XP
2. What firewalls you have? G DATA Internet Security 2006
3. How much ram? 1 GB
4. Hard Disk space available? 58 GB
5. Connection type? (eg: dialup, broadband, cable, etc.) broadband/dsl
6. Modem & router brand name & model numbers? Motorola SBG900 Wireless SURFboard Gateway
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)? home
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. LW 4.12.6, Java 1.5.0_06
9. Who is your ISP provider (Internet Service Provider)? telmex prodigy
10. Do this simple test for us. Using your browser go here: http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there? I can't load the page, guess the test didn't work
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. It's an open wireless network but I think I'm the only one using it
12. Is this a your 1st try at LW or is this a new problem with an experienced user. I've been using LW forever, but this problem is new
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? I do

I didn't have problems before changing to the wireless last week. But even after it worked fine for some days. But 2 days ago I suddenly couldn't connect anymore. I didn't make any other changes. I tried with port forwarding, and it worked for one day. But today I can't connect again.
Please help me, I don't know what else to do