Help with basic networking

[Narmer]

I have two laptops connected to a wireless router, which is connected to a cable modem. The internet access works fine but I cannot network between the two computers. I've ran the 'Set up a home or small office network' for about ten times now but nothing seems to happen. Both computers have file-sharing allowed and each has a name. What am I doing wrong here?

EDIT: One laptop has Windows XP Home. The other has Windows XP Tablet PC.

 

[JackMDS]

Successful Sharing involves some general consideration in Network settings, http://www.ezlan.net/sharing.html

As well as specific adjustment of each computer according to what it is allowed to be shared.

Basic XP - http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/filesharing.mspx

Advanced XP - http://support.microsoft.com/default.aspx?scid=kb;en-us;304040

Vista - http://www.microsoft.com/technet/network/evaluate/vista_fp.mspx>

Printer Sharing XP - http://www.microsoft.com/windowsxp/using/networking/expert/honeycutt_july2.mspx

Firewall setting for Sharing XP - http://support.microsoft.com/kb/875357