SHARED FOLDER MMC SNAP IN NOT WORKING CORRECTLY

[pafos]

I have two computers running Vista sp1. Both have the same MMC version. On
one computer I can use the shared folder plug in to create a new share but on
the other computer the menu (NEW SHARE) to do it does not appear when you
right click shares in the shared folders console tree.
In the working system if I right click on on any share folder shown I get
the option to stop sharing but on the problem MMC I can only OPEN the folder.
Any ideas where to start with this please

 

[pafos]

Further details.
On the PC that has the problem with MMC if I go to the command prompt and
type mmc I get the blank MMC console. If I add the shared folder plug in then
try to use it I still get the problem. Is there a service that is preventing
the shared folder wizard running ??