SAP Disclosure Management Excel to PDF plugin

Hi Experts. I´m using SAP DM 10.1 SP02.

The plugin Excel-to-PDF is registered.

I create a new report type: Excel-PDF , configured as in the user help guide (chapter 2.4.5.3)

I create a report with report type: Excel-PDF

When trying to create the report, an error appears: "An Error has ocurred while rendering Excel-to-PDF: PDF document could not be created, because no Excel worksheet is defined for PDF generation"

The same error appears when trying to make a preview,

How can I define an Excel worksheet for PDF generation?

Looking at the log file, there´s not any further information about this error.