I have just connected my IPod to my HU using the Pioneer IB-100 interface & am now having problems.

I had to connect the IB100 into a wire which is permanently live so I connected into the one that goes into the back of my HU, but now every time I turn on the HU it has lost its radio presets - its as if when the car is turned off power is no longer getting through to keep them in the memory - any ideas?!
Also, the HU used to go on and off with the ignition but I now have to use the power button each time, and it wont come on unless the key is in the ignition for some strange reason! Any ideas?
The head unit is an old Pioneer KEH P4300R...and I cant seem to get instructiond for it anywhere!
Any help would be appreciated.
