sharing the root of drives over a LAN

To Kevin Webb

I have a LAN here at my house using a router to share broadband internet and 2 additional linksys hubs. We often have 6 or more PCs on the LAN. I have always been able to share the root of the CDROM drive on my WinXP desktop PC for accessing CD files by others.........until now. For some unknown reason, my notebook now produces the following message if it tries to access the CDROM drive shared on my desktop PC as "50X":
"\\MyPC\50X 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 never seen this message before. This just started after I completely rebuilt my Sony VAIO notebook by installing a new HD and running Sony's System Recovery CDs on it to put it back the way it was new. I am logged in as the administrator on both PCs. They both run WinXP Home. Any help will be appreciated.

Thanks.

Lawrence Gill