Question about wireless card AWUS036NHA, Alfa AWUS036H

I have Kali linux running on virtual box. My problem is that my wireless interfaces only work when they want.
per example,
Alfa AWUS036NHA , this one sometimes will freeze my terminal. It just won't work. Not sure why, not sure how to troubleshoot the problem either.
Either way I bought Alfa AWUS036H , and everything was working fine, until now wash -i mon0 , just won't do anything.
Am I not doing something right? do they need to be powered externally. I do not want to keep buying these items if they are going to quit working. Or it might be just a setting

anyways,
Thank you guys.

Before you plug them in, run:

Code:

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airmon-ng check kill

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Now plug them in.

This will kill all other networking services. Mine sometime does the same thing, but after I kill the services it usually works fine.