Different type of SpreadSheetEntry while creating and retrieving!?

[Abdullah Akbar]

Hi,
I´ve created an empty spreadsheet using Document List API. I have a 
com.google.gdata.data.docs.SpreadsheetEntry instance.
And when I retrieve using GoogleDocService , i get 
a com.google.gdata.data.spreadsheet.SpreadsheetEntry instance.
How can I get a Spreedsheet API instance, 
com.google.gdata.data.spreadsheet.SpreadsheetEntry, in order to populate the 
spreadsheet ?

Can some one please help me here?

Thanks a lot.