Each time when i'm in any server where are about 15 players, after changing the track i got disconnect/ lost connection.

I have this problem since Y version, in X version it was ok. I was in servers with 30 players, but it was ok.

My computer specifications:

CPU - Intel Pentium 4 506, 2676 MHz (20 x 134)
Mobo - Asus P5GPL-X
Ram - DDR1 1280Mb
GPU - Club 3D Radeon X1950GT 256Mb
PSU - 450W

Where could be the problem? How to fix that or avoid?

DDR1 1GB? That could well be it. A lot of people seem to not be able to hold the connection and load the track, so they time out. It used to happen to me on CTRA every track change with my old PC (2GB DDR1 PC3200), but with my new PC (4GB DDR2 PC6400 OC'ed to about 8400), on the same connection, I never time out. Could be it

1 or 2 years earlier i felt like my computer is up to date, and i have no need for upgrade, but now...
Time and money in computers runs too fast, i can't imagine how to be up to date. Should i buy new PC? And for how long time could hold up new PC, because i was thinking about buying new one earlier but nothing serious.

My PC is from 2005 year.

I don't mean there's anything wrong with the PC, or that you need to upgrade to a new one. But if your motherboard does support DDR2, I'd definitely recommend getting some, as that is almost certainly causing it. The CPU is 2.7Ghz, and that's not a problem, and the graphics card wouldn't be causing you to time out. 2GB can be had for €20-30 anyways The pair of 2x1GB packs I got were €35 each, and they're pretty good

My motherboard does not support DDR2 and even C2D not too.

I'm on only the 1GB of DDR2 800Mhz RAM and can securely hold connection during a track change on a full CTRA server without problem.

Have you considered it's your internet connection?-

Yes, i got thoughts about internet connection. I could even accept idea that earlier my internet provider was better than now and internet was a lot faster, that's for sure.

I dont think i got a bad inet connection, but i always time out while track changin (and 1st time connectin to a server with (big) Insim).

As I said, it's nothing to do with your internet. There is no extra bandwidth in use when a track is changed, just one packet to tell the client to change tracks. Considering packets are sent every half second when in race, that's not a problem. It's down to hardware, and the RAM looks to be the weakest link

@ Pioneer - how long does it take for your pc to load up blackwood, for instance?

15.94 seconds - with full load (100% texture load, generating, car load)

That's quite a long time O.O;

Generally takes me around 5 seconds from clicking single player - blackwood to being able to drive. Maybe it's your ram/cpu combination?

Quote from PioneerLv :

15.94 seconds - with full load (100% texture load, generating, car load)

Yeah - thats why.

My laptop takes less than 3 seconds.

My PC (now obsolete LFS-wise) took a similar amount of time and I got disco'd at track changes.

Earlier loading was much faster than now. Maybe high quality texture pack is affecting too on loading time?