The Web Server you are trying to reach has been shut down.
The below links are for the working locations for the former sites.
Outside County Network
General Mapping Site -https://gis.kcgov.us/app/kcearth/ (Non Silverlight)
Polling Place Lookup - https://gis.kcgov.us/app/wab1/voterlookup/
Inside County Network
Silverlight Mapping - https://gisapp.kcgov.us/kc/KCEarth_Silverlight/default.html
Internal General Mapping https://gisapp.kcgov.us/kc/kcearth/ (Non Silverlight)