View update on DropDownByIndex selection

Hi,

I have a view composed as follows:

- One DropDownByIndex linked to a context attribute SERIAL.code listing a series of serial numbers

The dropdown does

- One TextEdit linked to the calculated context attribute SERIAL.description reporting the extended description of the serial number

- One FileUpload component linked to a context attribute FILE.resource

I have this problem:

When the user selects a different SERIAL.code from the dropdown, the textedit with the description DOES NOT change its content by showing the corresponding SERIAL.description

If I attach an empty onSelect event handler to the DropDownByIndex, then the view is correctly updated and the TextEdit shows the description of the selected element but if the user inputted a file in the FileUpload, then the FileUpload input field is emptied!

(The Resource object of the FileUpload is still holding the resource loaded by the user -- ie. the context attribute IS NOT null -- but the input field becomes blank and so it seems that the file hasn't been loaded properly).

Can someone help me?

Thank you,

Pietro