direct Monitoring

I am on Cubase 5 and cannot get direct monitoring to work. I have a M-Audio Delta 10-10-lt audio card. On a PC.
I have been using cubase for some time and it used to work on older versions.
I can monitor thorugh cubase DAW but I have a 3 ms latency. I used to be able to record multiple instruments and vocals using Direct monitoring via cubase Device set up. and using tapemachine mode.
Anyone have any tricks to get this to work or is this a bug on this version.