problem while opening identity management in user admin

Hi All,

when i am trying to open Identitymanagement in user administration, the iview is not opening and displaying the following error msg.

1) A check if users can be created failed. The UME configuration might be inconsistent. Check your Persistence configuration.

2) An error occurred when initializing a backend service; contact your system administrator

and nothing is displaying in the page except these two lines....

how to solve the problem? reply soon its very urgent...

Regards,

Vila.