Hi y'all. I bought this car dock because I heard it fits the HTC Sensation: Amazon.com: HTC Evo 4g Car Mount with Flexible Gooseneck - Vertical and Horizontal View + 3.5mm Aux Cable: Electronics

The "case" part does indeed fit the phone, however I am having difficulty connecting the "case" part to the "gooseneck" part, and of course I didn't get an instruction manual with my order. Any help would be rad. Thanks!