Zac, Thank you for your quick replay! No, usually I'm using Ajax viewer. There are no problems. -- View this message in context: http://osgeo-org.1560.n6.nabble.com/MapGuide-Open-Source-WMS-Layers-visibility-in-OpenLayers-tp4660181p4660202.html Sent from the OpenLayers Users mailing list archive at Nabble.com.