Renault Megane Cassette Player not recognised?

I have an 01 Renault Megane, I tried to use the cassette player today, inserted my cassette and nothing happened. It usually recognises I've inserted a cassette and switches to cassette mode. I then pressed the source button to try to switch it from radio mode to cassette mode, however the 'Cassette' option didn't come up just the radio, it was as if the car didn't know it had a cassette player?!?

The battery recently went dead and I had to insert the radio code to unlock it, which worked but the cassette player does not.

Can anybody shed some light on this please?? Thanks.