With regards to the Convert Document, your model is wrong.
It should be:
Note that only the conversions specified in the comment inside Convert Document are supported.
I remind you that in order for this to work, you must ensure that OpenOffice is running as a server, by executing the following command from the command line:soffice.exe -accept="socket,port=8100;urp"
With regards to the attachment issue, this requires further investigation.
For best results, use the Firefox browser..