HOME LAN CONNECTION PROBLEM

Question

HOME LAN CONNECTION PROBLEM
I set up a 2 unit home net with a Linksys WRT54G Router, One PC hardwired to Port 1 and a Notebook conected via the wireless port. Both PC are Pentium and WXPPRO.
When I try to browse the local workgroup ("MICASA") I get the following error message: "You have no access to "WorkGroup". You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The server list for this workgroup is not accessible at this moment."
Wireless has MAC filter enabled and security disabled
I restricted DHCP adresses to only 2 => 192.168.1.100 and 192.168.1.101
Win XP Pro Firewall is disabled in both PC
I worked as ADMIN with proper password in both boxes. Full file security enabled.
Shared both C disks with proper local and share permits.
In registry both PCs have: HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Lsa/"restrictanonimous"=0
I could see both PCs in "my network places" for a couple of days, with full and proper file sharing, and then both pc's dissapeared. Both PC's access internet properly.
The obnoxious message listed at the beginning began appearing when I click "Workgroup" in "my network places". I tried everything, including unsetting and re-setting file sharing for C disks. Nothing happens.
The W2K Resource Kit Browser Monitor reports no brouser on the LAN.
I can ping one adress from the other and I can log onto the other box shares by typing the name in Windows Explorer (\\Pentium or \\PCdeLidia)
Any clue will be welcome

Answer 1

Thank you, timelord.
I checked the Node setting (ipconfig /all) and it is "broadcast".
So, I decided to start all over again.
1) I un-shared all shares in both computers (The notebook and the desktop).
2) I reset the linksys router and used the Linksys setup wizard to reconfigure it from 0 (cero) - dropped (disabled)  ALL security - Left only admin setup password - Changed the workgroup SSID from "MyHome" To "Home" - just to be sure.
3) Run network setup wizard in desktop (WXP Pro). Sharing Printers and files enabled.
4) Stopped and Disabled the WXP firewall in the Desktop (it was disabled, but the network wizard enables it and leaves it running)
5) Rebooted the Desktop
6) At this point, I finally could browse the local lan and see my desktop listed
  My Network Places / All the Net / Microsoft Windows Network / "Home" / "Pentium" (my desktop)
7) Went over to the notebook and re-checked all file-sharing was off, then I erased the WI-FI profile in it (uses the Intel wizard), changed the workgroup name from "My Home" to "Home", Rebooted it and connected it to the Wi-Fi "Home" net that was detected. ALL security disabled, including WXP Firewall.
8) Now, the whole net is visible from both PC's
  My Network Places / All the Net / Microsoft Windows Network / "Home" / "Pentium" (my desktop)
  My Network Places / All the Net / Microsoft Windows Network / "Home" / "PCdeLidia" (my wife's  notebook)
9) I enabled a couple of shares in both machines and I could browse them and connect to them
10) Finally, all goes to hell: I shut-off both PCs and the LinkSys router. Then I powered the linksys, and then the Desktop. The notebook still OFF. And Voilá, same awful post:
"You have no access to "WorkGroup". You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The server list for this workgroup is not accessible at this moment."
I'm not even able to see myself.
One tip: I used the browser monitor from W2K. Before, I was able to see 3 (three) lines listed, no browser. Unfortunately, i did not write it down. Now I can see only the following 2 (two) lines:
MiCasa \Device\NetBT_TCPIP_ {€ unknown  (Not an Euro sign, something like that)
MiCasa \Device\NwlnkNb         unknown
Now I have to quit, no more time, I'll continue later and keep you posted
Thank you again