Incredible trouble with two A10 S203 network!

I had two Satellite A10-S203. This mobile are configured to operate on Microsoft network (wired network) with the working group. Have a different IP, name, MAC addresses, and same workgroup. To the network to work about 15 computers. When I connect to the network from one of them his works very well with the network. If I replace the previous book to second it's job well too. But when I connect both at the same time to the network I got hurt. One work, second cannot send pockets but can receive them. When this two laptops are connected to some other network computers sometimes hangs up.
This portable work very well no but together do not work in the same network.
I checked the configuration of these hundreds of times and it's ok they can see and browse the net when are linked separately. Thought is it net card MAC addresses conflict but it isn t.
Can someone help me with this?

Post edited by: TomaszE

You are quite right TomaszE, very cryptic your problem!

But what is the subnet mask of the network? Also identical on all machines?
Have you tried to change the IPS of the two laptop, just intended to test?
All are machine have static ip addresses, or runs a dhcp server in the system?
What about firewalls installed? Some programs have a blacklist of ip addresses that are blocked permanently to do anything on the network.

Please give me more information

BR

Tags: Toshiba

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