Subreports in group footer not diaplayed in CR XI server

[surima]

I have a report with 3-4 subreports in group footer.
Each one has a parameter linked with the main report.
When published onserver and previewed the report behave irregularly.One subreport shows all hard coded labels bt none of the database fields.
Another shows only single hardcoded field.

Please help!
Thanking in advance