Try downloading the latest version of the LCC from the steinberg website first. That's usually the problem when this happens.
Steinberg Cubase Artist 6.5.2 64-bit.
HP elitebook 8530b with W7 Home 64-bit
Terratec Producer PHASE X24fw - Steinberg Midex 8 - Steinberg CC121.
Mackie 802VLZ3 - Alesis M1 - Behringer Powerplay Pro-XL - Studio Projects C3
Yamaha DTX750k - Yamaha MO-6 - Waldorf Blofeld.
3rd party plugins:
Native Instruments Prism - BFD ECO - Arturia MinimoogV - Rob Papen Distort - Rob Papen Delay - Blue Cat Audio Free pack - Stillwell Major Tom - JSAudio CompShaper - Some more free stuff that gets little use.
My humble contributions to what could be considered music.