Don't use garmindevice.xml from nuvi 40 becouse webupdater will download files for nuvi 40.
Please answer me if you have something in Garmin folder, if you don't have i send you backup with xml.
p.s.
You don't need to create garmindevice.xml, nuvi will create by itself.I don't know how to create a xml file
On nuvi create empty folder Garmin.
Turn nuvi on, off and connect to Pc.
Now you will see garmindevice.xml in your folder Garmin on nuvi.
Look only if you have on the end .tmp or .xml.
If you have .tmp just rename it to .xml and run webupdater.
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