WebDynpro Java Interactive Form - Cannot Save at design time

Hello Experts,

I'm creating a Webdynpro java Application with an Interactive Form.

I set the InteractiveForm Property with these values:

- dataSource: I bind a Context Node (cardinality 1..1)

- mode: updateDataInPdf

- pdfSource: I bind a Context attribute 'pdfSource' (binary type)

- templateSource: I set with a file.xdp stored in /src/configuration/Components/<componentName>/file.xdp

I can edit my Interactive form, but I cannot save my editing (the save button remains always disabled) .

Am I missing something??

Thanks in advance,
Best Regards

AT