Jitter doesn't open any more! Help!

Massimiliano Viel's icon

Hi everybody,
all in a sudden Jitter doesn't work any more! And in the middle of a
project!
I use MaxMSP 4.6.3 an iMac Intel with OS X 10.4.10... today when I
started to work all the jitter external where no more accessible from
my patches...
Is it maybe because yesterday night I upgraded the OS to the last
security upgrade? I hope not!!!
Moreover, following my panic I tried to reinstall Jitter and... it
is no more possible! It says that I can't installi it because I need
MaxMSP 4.6, that I have...
What should I do?
Please help!!

massimiliano