¿Anyone have this problem with Internet?

Hi

¿Anyone have this problem?

The XMMS don't work when i listening a radio transmission, stop very fast.
And Gmail account and hotmail is not possible to send, is like working but never send.

I guess is close some ports.

Seeing IPTRAF when XMMS is working (for few seconds) and stop, on IPTRAF say CLOSED

I try Knoppix 5 and Knoppix 5.01 and is the same. On Knoppix 4.02 work fine, but I want update

Some documentation talk a bout IPTABLES, but I don have much time, I work, and I'm not expert user (obvius)

¿Any one know something about this?

Thanks