Serial Cable Question and root access question.

I have searched and searched on here and I cant get a definitive verdict, I have tried 3 different usb to serial adapters. I still cant get one to show up on my vera2. Can someone enlighten me on what I may be doing wrong. I have tried a Keyspan, Prolific and another generic adapter.

I am trying to connect my DSC alarm to my vera2 through the IT-100

Also I was trying to login with SSh and I cant. If I have read correctly you need to go to the advanced tab and set the root password and when I do I get a 500 error. Also I have tried to putty in and it will not accept the wireless password (read somewhere it was the root password also) . None of this works. Is this something that is not working for everyone or did I do something wrong?

Any help is appreciated.