Error Initialising database engine

Hi All,

I am using MDM 5.5 SP04 and a problem has occured that when i am mounting the server ,The mounted repositories pertaining to that server are displayed invalid.

ie all the repositories are marked by the <i>Yellow triangle</i>.

I have checked the database(Oracle instance) and the MDM servers are running fine .But whenever i am trying to do any activity on the repositories which require Database access as in Mounting,Creating,Unarchiving etc.the following error is displayed. "Error initialising Database Engine".

Please can anybody help me out.Points will be rewarded .

Thanks & Regards

Deepankar Pandit