[I have all my logs and Transcripts saved in my preferences and they are NOT saving....]

I have everything checked so all my logs and stuff are saved to my PC, and also so it saves the last bit of convo from that person. Yet when I open an IM with someone who I was JUST talking to, there is nothing there, when I open preferences and open my chat logs from my folder on my PC, it tells me nothing is there, and to make sure it is spelled correctly! HELP!