WMS can't be adjusted on a WMTS basemap

[ArnauFORNER1]

Hello,

I 'm trying to use a WMTS as a basemap. Its coordinate system is EPSG 3812.

http://www.ngi.be/cartoweb/1.0.0/WMTSCapabilities.xml

Then I want to add a WMS that have the same coordinate system: EPSG 3812, but also accepts 4326 and 4258.

http://ccff02.minfin.fgov.be/cadgisWMS/CP_CadastralParcels/MapServer/WMSServer?SERVICE=WMS&REQUEST=G...

When I try to add it I receive the following message: " can not be added to the map because its coordinate system can't be adjusted to align properly with the basemap."

Can anyone help me?

Thanks in advance

[MikeMinami]

This is a bug. ArcGIS.com was not reading the other supported coordinate systems. I have verified that this works correctly on our development servers as the layer does overlay. We will be releasing a fix in December.

I did notice, however, that the WMTS service appears to return all white images for me, using the TOPO layer. I don't know why...

Thanks,

Mike