Nintendo DS Adapter Plus Not recognized

[Nic]

I have had my NDS Adapter Plus for about 3 week now. Didn't have a problem with it.  Now, all of a sudden, my laptop won't even recognize it.  I know how to install it and use it correctly.  I tried the whole process on my other laptop and it still doesn't show up.  I'm guessing it's defective, but the red light is still on.  I don't know what to do.  Is there a warranty with this?  I bought from Amazon.com.

[Nic]

The adapter won't even show up in the device manager under unknown devices or anything.

[hkems]

You may consider to send it back to us. We would repair / replace it, and you just need to pay for the postage. Please email to [e-mail], and we would inform you the details. Thanks.