I have a imix DJ tech mixvibes 3DEX LE

And i can install mixvibes properly but i cant open up the program because it says "imix not connected" when i do have it connected.
I have used the DJ mixer on my computer since i bought it, i have had it conncted to the usb the hole time. but one time when i disconnected it then reconnected it it wont regonise the MIDI controller.
Normally when i press buttons on th e MIDI the green light flashes when it uses power but now it dosnt. It stays green. I tried on my other computer and windows still didnt regonise it. Do u have to have drivers for it? because it comes up no drivers installed and unknown device.
Everything is plugged in right. I have uninstalled many times and it still wont work for me. The computer just dosnt want to regonise it.
(remember i have been using it untill i disconnected from the usb port on time then when i wanted to use it again and thats when the problem started.
If anyone can help it would be apprecitaed