SHared directories not seen

Hello,

I have 2 mac : iMac + Macbook,
I installed Parallels on both machines : everythink OK with my iMac which can connect to all the shared directories of my Parallels iMac machine.

With Macbook, I can see from Finder all files of my local virtual machine with created red icon : "Windows XP", but if I click on "MACBOOKW" the Workgroup name of my VM displayed in the finder, I get an error message : "Macbookw does not exist"..., but I am sure it exists.

Idem if I want to try to reach MACBOOKW with my iMac, which makes I cannot reach any shared directory beetween iMac and Macbook virtual machine.

All my virtual machines share the same Windows XP workgroup. I would like my both Mac could reach any of the shared directories of my 2 Parallels machines.

Imac can share files with its VM , but cannot see MacbookW's VM shared files,
Macbook can share VM files with the red icon created by Parallels , but not with the "Macbookw" Finder shared label.
MacbookW can read and write share directories of iMac's VM.

Not sure I am clear.... it seems I have some kind of restriction on my MacbookW machine, but I cannot say where.

All my 2 machines can ping each other (VM and Mac OSX), both VM are on the same Workgroup, but MACBOOKW machine cannot show its shared directories to iMac and Macbook (except with its red Parallels icon to Macbook).