Have you set up your email account with Windows Live Mail?
Windows Live Mail needs to know various pieces of information such as your pop and smtp addresses, and your email userid and password.
These would have been setup on your old computer so it was up to you (or somebody else) to transfer that information to your new computer.
Windows Live Mail cannot guess that informaiton so it has to be entered manually.
There are also programs that will copy the information across from your old computer to your new computer. Here is one program from Microsoft called Windows Easy Transfer, but you will need access to the old PC so I hope you still have it.
http://windows.micros...windows-easy-transfer