Remotes with K5

[Cage]

I have had my K5 for a bit over one month and am loving it.

However, and there always seems to be a 'however', neither my cable remote nor my IR remote seem to work, and they were both fine on the K20D.

The only remote function enabling I can find is with the 4 way controller.

OK, I suspect I'm having a 'Senior's Moment' and missing something simple, but crucial.

Any help welcomed.

Thanks

Kevin