Cannot Export to Excel (secure connection)

[w_heres]

Hi all,

I want to export an object with some data to Excel with the XL button in the caption. This gives me the error:

"The file you are trying to open '67aedc95f946403cb0d1797f59052ca1.xls' is in a different format than specified by the file extension...

The content of the file is:

<result><message text="Empty response" /></result>

We use an secure connection and al the communication goes through the port 8444.

Does anyone know how to solve the problem?

Thanks for your answer

Kind regards,

Wiegert Heres