Cannot set up a website and FTP problem

[geoak]

Hi All,

I am newby to Plesk. I got from a hosting company a server with Plesk 7.5.6.

I can have only one IP and I wont to server several websites on different domain names. I have created three domain accounts. I also changed DNS of all three doamins to those that the datacenter provided me. Now I have two problems:
1. I hit the domain name on the browser and I dont get the pages of the website, like if it isnt accesible.
2. although I have setup a FTP username and password when I try to login I get error message 425 Can't open data connection.

Any ideas?

Thanx in advance