Sorry Robert, thank for your quick answer, I have explained in a confused way , the thing is that , Im trying to add the WMS, that are found once you click on the link. Some of them are
The Flex Viewer will not convert the WMS service for you, but it will attempt to ask the WMS server to return the data in the appropriate projection. If the WMS server does not support Web Mercator, then you will not be able to use Web Mercator base maps.
In this case only three projections seem to be supported, so you need to make sure your basemap is in of them: <SRS>EPSG:32628</SRS> <SRS>EPSG:4326</SRS> <SRS>EPSG:32627</SRS> If you don't have your own basemaps, you can use the "old" geographic basemaps, see e.g. http://dl.dropbox.com/u/2142726/config_wms_es.xml for a full config example, or just the <layer> snippet below:
<layer label="Red Geodesica de Canarias"
type="wms"
url="http://idecan2.grafcan.es/ServicioWMS/RedGeodesica"
visible="true"
visiblelayers="RG_4OR,RG_ROI"
/>