iTrip P1591 and iPhone 4S not working with V 8.0.0

Version V8.0.0 of the iTrip Controller ist not working on a iPhone 4S with the iTrip P1591. So backup your old version.
The UI looks very fine, but i cant use it. The FM Transmitter works very fine (standalone)
@Griffin: please fix this bug.

Geni256 about iTrip™ Controller, v8.0.0