Can't Connect PC to "Server PC" in Active Directory?

[717]

This is what I've done step by step:

Server PC (Windows Server 2008 R2)
1. Got a PC and reformatted it to "Windows Server 2008 R2"
2. Went to Server Manager
3. Installed Active Director
4. Made a Domain named MyDom.local (got the .local name from this walkthrough http://www.howtogeek.com/99323/installin...-2008-r2/)
5. Went to Local Area Connection
6. Properties then Internet Protocol Version 4 (TCP/IPv4)
7. When entering an IP address I just put random numbers but not exceeding 255, my current ip that I put is 192.168.50.150, the subnet is 255.255.255.0, the default gateway is 192.168.50.1
8. For the DNS server I also put random numbers and my current dns is, 150.50.50.1
9. After that I pressed ok and went to my User PC

User PC
1. Went to Local Area Connection
2. Properties then Internet Protocol Version 4 (TCP/IPv4)
3. I entered the same IP address, subnet mask, default gateway and dns server
4. Pressed ok then closed it
5. I right clicked computer
6. Properties
7. Change Settings
8. Then I pressed the change button
9. In the Member of, I put in MyDom.local and pressed ok
10. Then an error saying "an existing connection was forcibly closed by the remote host

What did I do wrong?

Oh and I have another question regarding changing ip addresses in Local Area Connection Properties, when I do it I loose internet connection how can I connect to Computers (w7 and w server) but still have internet connection?

Thanks Everyone

I actually asked this earlier but this has an additonal info regarding the IP and "User PC"

Rankine Zero answered this but I can't get a hold of him so i'm hoping he'll stumble upon this question

Additional Details for Rankine Zero:
Thanks for answering, here is an additional info on what/why I did:
1. About the number 7 sorry but I was watching a tutorial and the guy didn't explain his address so I made mine up
2.. I tried what you said and it gave me an error: DNS name does not exist
3. Forgot to mention I am using a router, my "user PC" connects to a router via Lan cable(rj45) and also my "network PC" connects to the same router via Lan cable(rj45)

[V. Perkins]

Read this thread where someone has the same problem as you and gets it fixed.

Good luck!