I am using this DTM:
<http://ags.cuzk.cz/arcgis2/services/dmr4g/ImageServer/WMSServer?request=GetCapabilities&service=WMS>

At ArcGIS I am able to ready pixel value of the raster but at QGIS it doesn't work. Tried this plugins to get the value

* Point sampling tool
* Value Tool
* Profile tool

But the layer looks empty, like no pixel value in there (at ArcGIS there are).

Can anybody try me link to confirm same issue with layer? Maybe I do something wrong.