I can't ping my other pc on my network

Hi guys

really need some help..
i have 2 networked pc's using my gigabit switch.
i assigned them ip address of the same range(10.10.10.100 & 101) and i can ping both.

i change the ip address of the other 1 with different ip range(192.168.0.220) because i am going to connect my pc to the internet through my office internet settings.

my problem begins here..i can't ping the other pc & vice versa.
any settings i need to amend so i can ping the other 1? please shed me some help.
thanks a lot.

re: I can't ping my other pc on my network

I am not sure if you are still having this problem but lets back up.

Did you mean switch or router?

What are you connecting the second machine to that has the 192 address?

Are you saying you have a switch that routes 10.10 in the office in addition to the office network which is on a 192 subnet set.

Please explain so I can help you further with an answer.