My FL-600R arrived today after a few weeks wait. So far, I have managed to get the white card out but now the diffuser is stuck in there and I can't get the white card back in. Is there a trick to this? A more troubling issue is that, despite being in P and AutoISO, the OM D appears to only shoot at ISO 200 as soon as the flash goes on. If I turn the flash off, AutoISO works as normal. Is this what it is, or am I missing something?