IMovie hangs, no video input and then crash!!!! HELP!!

Question

Hi everybody !!
This is my first post here so I really hope you can help me.
I have a G4 Dual 1.25 with an Canopus ADVC -110 and every time that I want to import from the Beta SP (the input switch from the Canopus is in analog) the software show that the camera it's connected via firewire but I don't see any video input although I can see video output from Canopus in my reference monitors, and, if I switch to the edit tool or any other tablets or features the software crashes!!! I tried deleting the preferences, repairing disk and permission, reinstalled ILife again and nothing!
Then I reinstalled the system software and it worked fine but a few days ago I was converting a QT movie to a DV format so I can use it in Logic & ProTools and since then I'm having the same problem again.I deleted pref, repair disk and permisions but still the same!! I really need some help because this one of my main tools in my recording studio so I can do my msx scoring.
Thanks!!!
G4 Dual 1.25   Mac OS X (10.3.9)   1.25 RAM, Canopus ADVC-110

Answer 1

I tries that but still!!
What I did I moved all the preferences to a new folder in my desktop and open iMovie and it worked fine so, I started to move them back individualy or in pairs anduntil i found the one wich was giving me ****!!it was a folder names by host after that the software still working just fine. Any ideas what this folder means ? because it had some preferences inside that I have no clue what they're about. Anyways, at least i know where to go next time if it happens again (hopefully it won't!!). Thanks for all your help and for your responses.
Take Care!!
G4 Dual 1.25   Mac OS X (10.3.9)   1.25 RAM