My 2 month old wireless keyboard will not connect to my mini mac.

I have a 2 month old apple wireless keyboard I use all the time. MC184ll/B. Model no.A1314. I use it with my mini mac.

I brought them to a one to one lesson. The keeboard would not work. the teacher could not get it to work.

I put new batterys in. Still not working. I brought it in to apple and it worked. ## I tried it at home still not working.

My mini mac is working.

Please help.

Paulfromdundas