Help with jumping chain on Chainring

jwizard Posts: 3
edited August 2014 in Workshop
Hi there!
I've got a 11-25 and 52/36 Di2 Setup on a Cervelo S5.
When I'm on the five chain at the back and put on some
pressure, like accelerating after a traffic light I want
to change quickly to the large Chainring. But when
I do this the chain almost alway jumps and ends up
off the chainring and last time it got stuck between
the frame and the ring and scratch the frame :-(.

What can I do to prevent this?

Thank you in advance!