Home Network - File Sharing

A coworker directed me here.

So, the situation. I have a desktop wired to a Linksys WRT54G router (call it Main), an old laptop newly equipped with a Linksys Wireless-G Notebook Adapter (call it Term), and a brandnew HP Pavilion laptop with built-in wireless G tech (call it Lap), all running XP SP2. After going through the normal set-up procedures, I was able to get each one to connect to the internet, via the router (SBC Yahoo DSL, if it makes any difference). I then attempted to set up the home networking aspect of the computers. In other words, file and print sharing. After a round of "Oops, forgot that setting," I stood at the following conditions:

* Lap and Term could share between each with no problems

* Main had full access to the shared folders on Lap and Term

* Lap and Term could not access the shared folders on Main

* Main could not access the shared folders on Main when using My Network Places

In the later two conditions, the computers could see the first level of folders, but permission was denied when attempting to open the folders. The error message generated is as follows:

"//Main/SharedDocs is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.

Not enough server storage is available to process this command."

I have gone through the support pages at Microsoft (318030 in particular) and nothing has worked. I have turned off all firewalls. The folders are set to be shared. There are some problems with other programs on Main that seem to result from access being denied. So I'm pretty sure that access is being improperly denied by Main, even though an administrative account is being used to make these settings. Is there anything I can do, or do I have to do a reinstall of Windows?

I was hoping to avoid the "are you an idiot phase" but it looks like I'll have to detail everything we have done to this date.

Filesharing:

Go to My Computer. Under Files Stored on This Computer, right-click Shared Documents and select Sharing and Security... from the pop-up menu. On the Sharing Tab, select both check boxes in the middle section ("Share this folder on the network" and "Allow network users to change my files" under (Network sharing and security" )

Remember, I have XP with multiple users (my wife and I). Currently, there are no passwords, but once I get the network properly set-up, that will change. However, this sounds like an apples-to-oranges question. Please explain further.

Two of the computers have guest access, Lap does not. What difference does this make?

Then why does it work for two of the machines, but not the other? Remember, the one machine can access the other machines. Reread the symptoms, you are misdiagnosing the problem. Baka!