More infos about the issue:
The line i add in the PRJ file:
"EPSG 3978 Canada Atlas Lambert (NAD 83)",3,74,7,-95,49,49,77,0,0
The link i use to connect to the server:
http://geoappext.nrcan.gc.ca/arcgis/rest/services/BaseMaps/CBCT3978/MapServer/WMTS/1.0.0/WMTSCapabilities.xml
The error message i receive from the GUI:
Une projection prise en charge doit être indiquée.
Thanks for your help
See AttachmentSee Attachment