Server w/ 10 work stations intranet doesn't work but internet does?

Have a server i didn't set up originally.  10 workstations connected threw a hub then server.  they all can get on the internet but no connectivity to the intranet.  Printers, ect.  Sever is runnning 2003.  Not that  educated in server OS.  Workstations and small networking yes.  what could be the issue?  Where to start?  Oh, they recently moved the sever hardware and have had issues ever sense.  Also, it sometimes works and sometimes it doesn't?  Printing to the networked printer can see it but no movement.  Sorry to be so short on info but will be working on it this afternoon.    

Hey, Thanks in advance for any direction you can give me.

Jeremy