while refreshing a Webi report from BI lAUnch pad , getting database error . It is trying to fetch the old database name , which is not in use any more. Could anyone please help me , how to resolve the issue?

Even though , i have pointed to new database , but still while refreshing its trying to fetch data from old database and throwing error as "Database Name or database Alias could not be found ". help needed to resolve this issue . Thanks a lot