Keep disconnecting after 1~2 mins...with Wireless Access Point

I have a home network with a DSL/cable modem, a Access Point and 5 Wireless Adapters used on 5 laptops.
The problem is... Internet connections (really is P2P connections) stopped (0kbps) after few seconds.
But if I start another P2P, the new one works for a period. Bacially it's depend on the time of individual connections I guess.

I'm sure I have the most up-to-date firemwares and drivers and stay in range.
Is it something to do with the ISP?

OS: XP Pros and Homes
AP: Compaq CP-2W
SMC wireless adapters
The modem is netgear something.... which I'm not sure...
winfred01Asked:
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Computer101Connect With a Mentor Commented:
PAQed, with points refunded (50)

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maehdrosCommented:
Troubleshooting steps:

1. Run a continuous ping from one of the laptops connected by wireless to the AP:

ping 192.168.0.1 -t (or whatever AP IP address)

If success goto 2. If failure then

Connect a PC to one of the hardware ports. Remove the wireless adapter or use a computer without one. Run a continuous ping to AP IP.

If failure, reconfigure LAN settings on AP. If success re-configure wireless settings. I.e. remove encryption, change channel, etc...

2. Run a continuous ping from one of the laptops connected by wireless to an external IP:

ping xxx.xxx.xxx.xxx -t

If failure, re-configure WAN settings on AP and/or complain to ISP. If success, look at p2p settings.

Hope that helps.
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winfred01Author Commented:
I've already tried it before. I think it's something to do with Virtual Server (dunno... no matter on or off) or ISP?
I've enabled V.S. to map the ports I need.
DMZ is on, MAC spoofing is on.
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maehdrosCommented:
If you are only interested in the P2P, it should go right through the router and not require setting a virtual server.

DMZ shouldn't make any difference but it should probably not be used.

The ISPs in my area have abandoned MAC address binding. I haven't had to spoof for a while. It shouldn't make a difference.

Some P2Ps let you set the port. You might also get a port scanner and scan someone else's port and make sure it reads open.
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martianismCommented:
try pinging between two laptops within the network as well as between the ap and a laptop.

--
Martianism
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winfred01Author Commented:
not only P2P, other thing like ICQ will be disconnected as well. But I use it mainly to send and receive files via ftp.

what about DHCP? I've no idea...
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winfred01:
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