If you've only just bought it and it is not working I'd take it back to the
store right away and either get it replaced or repaired. Optical drives do tend
to fail unpredictably and they are expensive to replace.
but when i plug my phone in to the USB port a second F: removable drive >
appears also (DVD??) but it still doesn't work
I believe it is not unusual for devices plugged into USB to be regarded as
drives and given a letter -- it is probably treating your SIM card as a memory
device, which it is.
But how to use that is really a matter for the phone manufacturer. I know I have
not succeeded in getting my PC and my Nokia phone to talk to each other.