Behringer FCA202 and XENYX802 Problems with headphones.

Okay. Here it goes.

I started setting up my FCA202 Fire wire Interface with my XENYX802 Mix board. I plugged in my jack cables into the Main Output of the mix board to the input of the interface (which under it would say UNBAL IN). Then, I plugged in the jack cables under 'LINE 3/4' that is on the mix board, to the output of the interface (which is under BAL/UNBAL OUT). Now, everything is cabled up. I plugged in my microphone in the mix board. Now with my head phones! I plugged it in my mix board. I hear quite-low sound right! But its only coming from the right side of my head phones! I mean... WHAT THE HELL?! Also, when I speak into my microphone, its so loud, so when I lower down the knob its all nice and quite in my head phones. BUT in my cakewalk software, I click on record button, no wave files are coming up on the screen! I only see little-tiny-tiny-winy waves that I cannot hear. So, I higher up the knob to the microphone! And guess what? ITS TOO BLOODY LOUD! I could explode my ears if i said one word.

So, what can solve? What is happening? Please, feel free to comment down below. I need help. Bye.