BMW e60 550i 2007 modelis gone off. Nothing is working.

[fabiboo50]

Please i need help. Can some one help me with my car.
I had a steering lock symbol on my dash. I woke up in the morning and the car won't start. First ignition opens but only key symbol shows. I call someone to reset the ELV for me, and in the process, the car completely to went off. Only inside light and parking light works. No central lock no ignition, key slot does not work.
I have CAS2 white. 6943971 is the number.
I hope to see your help. Thank you for your help in advance

What i have done so far is
I downloaded a flash here with the same ZUSB number of my CAS2 and flashed it but no luck.
I plugged CAS3 into my car, power came but when i inserted my key, the key cancelled symbol came, so i wrote my key EEprom on the CAS3 and insert into my car, even though power comes, no ignition, no key cancelled sign though. The system is still off.

[synkrotronic]

Hi,can you make diagnostic to all units?
Battery is charged?
Try to synchronize keys.

[fabiboo50]

No only CAS is seen, no ignition, battery is charged. CAS does not supply power to the system