WhiteShadow
I am a little confused here you said in your first post you have 3000kbps/300kbps. Well 8kbps=1KB/s so 3000kbps = 375KB/s and 300kbps = 37.5KB/s in you second post you say you have 256kbps/58kbps which is 256kbps = 32KB/s AND 58kbps = 7.5KB/s.
If you have 3000kbps/300kbps you need to set Limewire to cable and your DL to unlimited and your UL to 30KB/s
If you have 256kbps/58kbps you will need to set it to Dial-Up and set the DL to unlimited and the UL to 5.8KB/s
The link below is to another speed test site if you scroll down the page there is a speed test site in Prague which is a little closer to you. And should give you a more accurate test results.
http://www.dslreports.com/speedtest?more=1