I bought a couple of the 'Panram' cards from PC Nextday, some time ago and had no bother with them. Did you format it before you used it?
I suppose it's possible that you have a duff card and if this proves to be the case, I'm sure they will swap it for you.......
After silence, that which comes nearest to expressing the inexpressible is Music.
( especially when the music is played on a KN7000....)