I lost my key and I had a spare. I didn't know about the chip so the spare had no chip. Now my car won't start because I must have activated the imobilizer system which I didn't know about either. What can I do ?

 

When I bought my 2003 g35 4dr sedan it came with only 1 key. I had a spare made but did not know about the imobilizer system and that the key also had a chip in it so when I lost my key The other day. I used the key I had made without chip. Now I must have activated the imobilizer system because it won't start. Can you help me ?