mapping issues

hello every1, Im new to mapping and am having some trouble so I thought Id come here. When I run a map Ive just made the game reverts to the lowest graphic and resolution settings for some reason and i get a message in console repeated a thousand times it says -three keys down for a button '''- or something like that. Any suggestions would be appreciated thanks.

Its the hammer editor for counter strike source, after compiling the map and loading the text from the console gets stuck in the upper left corner of the screen. It just stays there and in console it goes up forever saying -three keys down for a button'''!!!'''