S3 not charging wirelessly topic

Hello all,

I had the nexus 4 before and moved to galaxy s3
So I have the new device for like a week now.

When I had the nexus 4 I used to charge it wirelessly with this charger:
http://www.ebay.com/itm/Qi-Wireless-...item5d44f9545c

when putting the s3 on top of the charger It doesn't charge.
Am I missing something?

Should I enable anything on the s3 in order it to charge?

Please advise,
Thanks.