Public folders cannot be accessible through OWA in Exchange 2010

Hi All,

I have an issue with My public folders, it is working fine with Outlook Clients, But when i tried to login through OWA it is throwing error

" The Public folder you're Trying to access couldn't be found. If the problem continuous, contact your helpdesk and tell them the following, the public folder couldn't be found because there is no Exchange 2010 public folder server.

I have created public folder database already  in Exchange 2010 and it is running fine for outlook clients. only OWA is not accessible.

Any help ?

Thanks,

Durai