CI2 Driver Problem in Cubase 7.5 64Bit

Steinberg Hardware
2

Are you using " Tools for CI2 " version 1.8.3 if you have Windows 7 Service Pack 1
or
" Tools for CI2 " version 1.7.3 if you have not updated Windows 7 to Service Pack 1 ?

Is the CI2 connected before you start Cubase ?