Unable to delete public folder in Exch 5.5

[ranijee]

I have 2 exch server 5.5 sp3 under same Org and Site container. 1 of the public folder was created in server b. But server b crashed and left is server a. Even though in the Outlook we can still see the public folder, but in the server a, the public folder does not exist coz it was hosted in server b. I could not delete it and the message says - 'Unable to display the folders.The contents of this public folder is currently unavailable. Either the Microsoft Exch Server computer servicing this public folder is down or the public folder has not been replicated to this site'
Anyone care to explain how to delete it? cos the server is no longer available.
thanks