The OP has been vague on explaining themselves. I cannot seem to understand what the problem actually is! At one point he said no sound in the phones. That is why I suggested the headphone output being tied to outputs 7/8 might be the issue.
So my question to the OP is and can you answer clearly, do the headphones work or not?
And if so and when you crank up the gain for example to record your voice, and you say the background noise is coming up for example my next question is the microphone pointing the correct way around. If there is a little dot on the microphone or the logo of the brand it should be pointing towards you.
Even in a relatively noisy environment, if you are close enough to the microphone you should be able to easily overcome any background noise.