Is this a new/empty card, or one that has been used?
Light staying on is probably due to incorrect removal, ie; not using "Remove External drive" to remove it.
You should always use the Remove External drive option to remove an external drive.
I would try another card reader, you may even have one, some printers/scanners have them built in.
Does this card work in the device that you got it for? camera, mobile phone etc.
and it does work on camera and the micro sd card works on my cell phone
but on the pc its not detected and like i said in the description the green light stays on i've also tried turning it on and off and restarting
i inserted my old adapter into it(the one with the write protection slider broken off)and it detected that with no problem but it seems to be every new one i buy