load Data Model error: Read timed out when generating xml in bi publisher 11g

Hi Team,

We are facing an issue while generating a xml out of the data model in the bi publisher 11g .

When ever we generate the xml it is running for long time and finally ending up with the error "IE page cannot be displayed"

When we refer the same in the log file we find that ""load Data Model error: Read timed out" .

So can any one suggest where the problem exactly .Do we need to increase the read time at the application level. If yes where exactly we need to make the changes at the application level.

When we run the data model query at the database level(Terdata) there it is taking 25 minutes to fetch the results out of the query.