First, check that the "lim" process is running on the new host, and that the new host name can be resolved (that is, "ping host" should work on both sides). As well, ensure that the master host can communicate with all compute nodes. For example, on Windows you might add an entry for a Linux compute host on the Windows master's host file:
On Windows 2000, this is found in C:\winnt\system32\drivers\etc\hosts
On Windows XP, this is found in C:\windows\system32\drivers\etc\hosts