View discrepency while migrating Crystal Reports from XIR2 to XIR3

Hi,

We are migrating Crystal Reports from XIR2 to XIR3. If the report is designed in Crystal client by inserting a subreport it does not come well in web viewer. If I do not use subreports then the view is same (both in web viewer & windows client preview).

Could you please let me know, what could be the problem and how to resolve this?

It's urgent. Your valuable time and solution is much appreciated.