Twitter itself has an AS3 library.
10x for the answer,
I investigated there library and it has two problems:
1. The password is sent over the HTTP - don't know why
2. Is there a crossdomain sulotion for communicating with twitter sever or i have to use PHP proxy?
You can communicate directly with Twitter.com, probably Twitter didn't
considered important to use a secure connection when they relesed the AS3