[SOLVED]Recording Issues

Hi All,
First post so be gentle
I've just reinstalled windows and am now having trouble with mixvibes.
I'm using vinyl turntables and the U46MK2
It's been a while but I swear I used to be able to do this:
Set MV to use just 1 of my turntables (vinyl) and play real vinyl on the other. This is working fine for output but when I go to record I get this message (never seen it before):
"Cannot use sound driver for recording"
Turntable 1 is attached to IN-1+2 on the U46MK2
Turntable 2 is attached to the mixer directly
Mixer record/monitor output is attached to IN-3+4 on the U46MK2
MV Deck 1 has an mp3 loaded
MV Deck 2 has the IN-3+4 loaded
The plan is to press record on MV Deck 2 and record it to wav but I get the above error when I hit the record button and choose the save location. It throws the error regardless of which record button I hit or whether or not I have a track loaded.
'Vinyl' is not highlighted on deck 2 (makes no difference if it is though) and when I hit the play button on deck 2 nothing happens (doesn't highlight). I can see the led display for deck 2 moving so MV can 'hear' the output from the mixer I just can't work out why it's throwing the error.
Any ideas?
Cheers in advance.
First post so be gentle

I've just reinstalled windows and am now having trouble with mixvibes.
I'm using vinyl turntables and the U46MK2
It's been a while but I swear I used to be able to do this:
Set MV to use just 1 of my turntables (vinyl) and play real vinyl on the other. This is working fine for output but when I go to record I get this message (never seen it before):
"Cannot use sound driver for recording"
Turntable 1 is attached to IN-1+2 on the U46MK2
Turntable 2 is attached to the mixer directly
Mixer record/monitor output is attached to IN-3+4 on the U46MK2
MV Deck 1 has an mp3 loaded
MV Deck 2 has the IN-3+4 loaded
The plan is to press record on MV Deck 2 and record it to wav but I get the above error when I hit the record button and choose the save location. It throws the error regardless of which record button I hit or whether or not I have a track loaded.
'Vinyl' is not highlighted on deck 2 (makes no difference if it is though) and when I hit the play button on deck 2 nothing happens (doesn't highlight). I can see the led display for deck 2 moving so MV can 'hear' the output from the mixer I just can't work out why it's throwing the error.
Any ideas?
Cheers in advance.