Connecting decks to the mixvibe...(resolved)

I have a set of technics and wanted to to connect them to the U-Mix Control Pro to record a mix in Cross DJ. I've connected the phono cables up to the inputs on the control-pro (and flicked the switches at the back to phono) and connected the ground wires too, went into audio preferences on Cross DJ and selected both the inputs as phono. Then finally went onto the main screen of Cross DJ and changed the player tab to line in. This works fine when one tab is on line in and the other on player, but when you select both to line in (ie sound coming in from both decks) the input volume increases loads as does the bass, effectively killing any chance of recording a mix. Suggestions?