I had a similar problem and it was becasue I needed to add radioberry to /etc/modules like so:
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Parameters can be specified after the module name.
i2c-dev
radioberry
Without this it wouldn't load the module and I had to re-install to get the device to show.