Please help!! Dolphin doesn't work at all!

[arniexd]

I just started with dolphin on my new pc and it doesnt work. I tried everything, updated direct x dowloaded visual c++, followed the exact youtube guide with the exact same settings. But still, it doesn't work. Ive tried both mario galaxy 2 and new super mario bros. Im sure it should work, since I have all the system requirements: XFX Radeon HD 6870 and a near i7, i5 processor with 2.8 ghz and 8mb, 1tb hdd and 8gb of ram. Both of the games are iso's . When I use direct 3d11, it says: failed to enumerate adaptors. When I use direct 3d9 it says, failed to anitialize Direct3d. And in all cases dolphin closes automatically. Please help!!