This WMS layer "wloclawek.geoportal2.pl/map/wms/wms.php" works correctly in two another windows programs (C:geo and Geoxa Viewer). When you write exactly: http://wloclawek.geoportal2.pl/map/wms/wms.php after that you will see menu to choose with layer you want and after that in that's programs you will see all layers you want. That same situation is with serwer WMS :http://radziejow.geoportal2.pl/map/wms/wms.php and http://lipno.geoportal2.pl/map/wms/wms.php and http://rypin.geoportal2.pl/map/wms/wms.php. a those three serwers works correctly in locus PRO when I choose numer of part terrain the program navigate me to the target but serwer WMS http://wloclawek.geoportal2.pl/map/wms/wms.php loads in locus pro correctly and show menu all available layer when you choose any layer on the map you will see only "connection failed". So I think that problem is with the program locus pro. My main job is designing power grids and often I have to get to a distant land in an unknown territory on which stands the pole with a transformer. This program allows you to load the layer numbers of parcels and reach them without any problems. Most of my work exactly in the area and just Wloclawek this server have problems. Why do not you try to load the "radziejow.geoportal2.pl/map/wms/wms.php" and then "wloclawek.geoportal2.pl/map/wms/wms.php" and you will see that the problem works for Radziejow and does not work for Wloclawek.