SQL server Database - Command based Crystal reports -Set Datasource location

Hi,

I am trying to change the datasource from Oracle to SQL server in an command based report.

The Script is modified to ANSI standard , now adding the command under SQL server connection and trying to remove the command under oracle connection, removes all the fields in the report.

I get an error when I try to "Set Datasource Location". I understand that each command belongs to the respective connection but is there a way to retain the fields even after modifying the Database?