what is your DHCP Server?
Do this test for wired and wireless.
Start > Run > Type CMD and Press OK
Type IPCONFIG and press enter
The first 3 octets (xxx.xxx.xxx.???) of the IP address on both machines should be the same.
The subnet on both should be the same
If they are not, then you will not be able to communicate with one another.
If at first you don't succeed; call it version 1.0