Are you all in one workgroup?
I am using Windows XP Pro and my family are using Windows XP Home on our family network (based on DSL wideband with LinkSys DSL router).
I can see the files on all of the computers, but they cannot see my Shared Files (or that I am even on the Network). I can print on my husband's printer (connected directly to his computer and not otherwise connected on the network). But I cannot even share my local printer (cheap Lexmark Z23). I right click my printer and click share, and I get this message: "Printer settings could not be saved. Operation could not be completed."