Exchange won’t access Public Folder

When I try to set the properties for any public folder in the Exchange Manger Snap in, I get the following Error:

“The object is no longer available. Press F5 to refresh the display, then try again.

ID no: 80040e19
Exchange System Manager”
When I refresh, everything stays the same. The public folders are still there, all is well. But I get this error when I try to get the properties for a folder or add a new one from the snap-in.

Any ideas?

Jed