linksys wireless router with printer port

I have a wireless router with one on w/l and one on RJ-45. Neither can access each other the network. Why?

I have a wireless router (Linksys), with my laptop on wireless and one PC using one of the four wired ports. I tried setting up a network between the two so I can also use the printer and share files. I used the XP Network Setup Wizard to do it and when I was done, my laptop can see but not access the PC but the PC can’t see anything or access the workgroup. Laptop is running XP Home, PC is running XP Pro. My younger brother says AT&T/Yahoo blocks ports for file/printer sharing. I say no they can’t do that.
Both computers have Zone Alarm…laptop has Zone Security Suite…the other the free one. Both have Trusted Zone level set to medium and Windows Firewall is shut off.

Look at the firewall settings in the control panel. You’ll need exceptions set for file and print sharing on both computers.

router