do the bulbs that you bought have a "cover" on top of it, or is just a bare bulb?
in other words, which of these two does the bulb look like?
if it is the first bulb, you bought the wrong bulb.. you can easily mod them to fit though..
if it is the second bulb with the "cover", then you purchased the correct bulb. you must not be twisting it in correctly.. they should be placed into the holder with the plug facing to the left, when putting them in from the front of the car.. once they are seated, you will turn it downwards until the plug is facing down..