I'm looking for a solution how can i connect my

You can download from here... http://www.behringer.com/EN/Products/UB2442FX-PRO.aspx

It Depends how many Channels you are wanting for a basic 2 deck set up using Cdj's you would want 4 channel 2 per deck 1 master out and 1 booth so you can hear it through your head phones but if you were doing Karaoke you would want 6 channels for 2 microphones all going 2 the master out. but it changes again if us software and controller because most software has an internal and external mix mode. Here is a video that might help

VIa, XLR, TRS, 1/4 Jack, phono,,

Hi, did you find a solution for this problem? I have it too.

This place has a great selection of Behringer parts. You should be able to find your knob here: http://www.dbmproaudio.com/behrparts.html

The outputs of these mixer needs to be connected to an active speaker.

An active speaker have an amplifier and a preamplifier.

Check the type of microphones connected and set the proper settings,

and connect it to other mic inputs .

Sounds like the output cable from the 802 is not correctly pinned to your input on the computer. Fred is on the right track but you may need to take it a bit further.
It may also be helpful to use a Pro USB audio interface such as the Digigram UAX220v2 (line level version).
If you wish to use the computer's on board sound card consider an IHF/Pro interface that converts balanced audio to unbalanced , and the proper cables. Two 3-wire balanced 1/4-inch from the 802 to the left and right inputs of the interface (XLR Male), then RCA (Red and White) to a 1/8-inch TRS Plug cable onto the the computers audio input.
Henry Engineering's Matchbox HD comes to mind.
Good Luck.

Check the 5 volts to the FX unit, If the voltage is low, the FX processor will keep reseting generating clicks, In a different product, the 5 volt filter cap was degraded and voltage dipped down to 4.5 volts causing resets.

It appears that both these use a 50K pot in the identical circuit and it is UNLIKELY they re-engineered very much so it is likely they use the same pot.

Behringer parts service should be able to tell you.