One laptop disconnects the other laptop from Internet

[SallyValley]

Hello,
We have a PC with a wireless modem attached and two laptops - one is MAC, the other is HP.
The two laptops compete for the Internet, knocking each other off the system. If the HP is connected, the MAC can't get on.
Help!

 

[yimmi]

Hm check your subnet mask if it is 255.255.255.252 change the 252 with 0 or whatever else you would like.