Application Development Software

Hello,
I have messaging server 7 installed on solaris 10 x86 machine.
In comm Express I was trying to a share folder.

ex.
user 1 and user 2 are able to share folders

user3 and user 4 are able to share folders
however user3 or user4 are not able to share folder with user 1 and user2 ...and same in reverse.

folder is shared still while searching for shared folders it says no shared folders found for this user.

the difference here is that user1 and user2 are on same mail host and user3 and user4 are no another.
Does this make any difference? or should I check something else also?

regards,
sumant.