internet or file transfer keep disconnecting!

[leepalao]

my cousin's computer that I build for him currently have this problem. It didn't happen before, but now:

1) when using kazaa, and downloading something or uploading, it'll says something like "connection reseted by user", and then the internet connection just disconnect.

2) can't send out data using mirc either!

3) with msn messenger, while sending out files, get this message:

We could not send this file because the connection is blocked. Please contact your network administrator or Internet service provider, they may be able to enable file transfers.

They're using a paid dial up isp, and didn't have that problem before. After the computer blew up, and i have to replace the motherboard, cpu, and power supply, it just happen.. i'm not really sure how i can fix that.. any options? they don't use firewall at all.

computer:
athlon 1.33
epox 8k7a+
256 ddr crucial
windows XP pro..

[Markoman01027]

Are you using any type of firewall program? If so, don't use the firewall program, and then try those programs to see if it works.

-Matt

P.S- Epox 8k7a+ is a great mobo

[N/A]

I have that problem with MSN IM too,but not with KaZaa or mirc.ya...check if u got a firewall.It happens when i try to send big files.
bang cable modem a couple of times