Connecting Android tablet as testing device

I have a problem related to connectivity between my desktop (Windows) and tablet (Android 4.1). I bought a new device (Colorovo City Tab Vision 7) and now I want to use it for testing of my applications, because emulation of android is very slow on my computer, although I forced it to create snapshot every run. I have downloaded SDK with Google drivers and also some unofficial drivers I found on web. When I connect my device, it first appears 'Other device' (label is CTVision7) and it's marked as unknown. I tried to install drivers (Google) for it, but windows said that they aren't suitable for my device, as it's not able to find them in specified directory. After these attempts I tried unofficial drivers. Their installation worked and now my device appears as Android phone, what seems to be good. But when I run adb devices or launch application in eclipse, there's no available device. I have turned USB debugging on, so it should work. Am I missing some step to make my device available for debugging, or are my drivers wrong? Is there any way to get drivers which surely work?