No offense to those who have responded but do you think the OP is a moron? If he has had the car a while he's clearly been able to use it before so the step by step seems like a dumb response...
I just had this start happening! It's annoying and aggravating... My buddy works for BMW and said I have to bring it in... Said it could be the key battery starting to go(on a 6 month old car with 14k on it... Whoever told BMW is more reliable that an Audi lied!)
Don't feel bad though, this will be the 5th time I'm going to the dealer.
'12 335i Sport Apline White w/black... Totaled
'14 535i xdrive M-Sport Carbon Black w/Mocha Nappa