WMSREAD - Blank Map Returned

I'm trying to import raster data from a WMS server available in the WMS database but a blank map is always returned.

The code is very simple:

------------------------------------------

layers = wmsfind('rischio');

layers = wmsupdate(layers, 'AllowMultipleServers', true);

selLayer = layers.refine('dbu:PAI_RISCHIOFRANA', 'SearchField', 'layername', 'MatchType', 'exact');

selLayer=selLayer(1);

selLayer = wmsupdate(selLayer, 'AllowMultipleServers', true);

%% ServerURL: 'http://webgis.regione.sardegna.it/geoserver/wms?'

latlim = [39 41];

lonlim = [8.5 9.5];

imageLength = 2000;

imageFormat = 'image/png';

[A,R,mapRequestURL] = wmsread(selLayer, 'Latlim', latlim, 'Lonlim', lonlim, 'ImageHeight', imageLength, 'ImageWidth', imageLength, 'ImageFormat', imageFormat);

geoshow(A,R)

------------------------------------------------

I have changed the lat/lon extension, the image width/length, the image format, but the result is always the same. This is strange because the WMS server is really accessible through GIS instruments like QGIS. Any suggestion? Thanks in advance

[Geoff Hayes]

When you step through the code, does the output at each statement make sense? i.e. what is the value of layers? what is the value of selLayer? etc.