9v battery to power arduino pro mini and mpu-9150

hello,i want to use a 9v battery to power both my 5v pro mini and mpu 9150..so i used voltage divider to get 3.3v for the mpu-9150.But the mpu-9150 uses 12c communication and it keeps saying connection failed even tho sda and scl are properly connected to the pro mini

pls i need an urgent reply

Does it work if you power each separately (not with a 9volt battery)?

yes,if i use a ftdi with pro mini to the computer

You need to make a pencil drawing showing all your connections and post a photo of the drawing. PLEASE do not use Fritzing.

A PP3 sized 9v battery probably cannot provide enough current.