I'm trying to cascade a WMS service in GeoServer (http://grb.agiv.be/geodiensten/raadpleegdiensten/GRB/wms?REQUEST=GetCapabilities&SERVICE=WMS).
I can view the cascaded layers just fine, but whenever I try to get FeatureInfo from a cascaded layer I get an error message saying that the layer isn't queryable.
I can get the FeatureInfo from the original service, so I know that there is actual FeatureInfo on the original layers.
I've combed through every available WMS setting in GeoServer but only found the 'Queryable' option in the 'WMS Settings' panel in the Publishing tab of the cascaded layers, which is obviously enabled.
Is there anything I'm missing, or is it just not possible to get FeatureInfo from a cascaded WMS service?