Multiclient doesn't work?

I'm tired to read the same line everywere. There you have the reasons why:

1- Avast blocks it.
2- Forget it if you have x64 bit.

Stop yelling, it's anoying.

Edit: Eventually you'll be able to run it in x64, but the process will not be stable.

I off avast for 1 hour and still dont work. Sorry 4 my english.