When i SSH server it closes in time

[User]

User Wrote:yum install screen
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
extras 100% |=========================| 1.1 kB 00:00
updates 100% |=========================| 951 B 00:00
base 100% |=========================| 1.1 kB 00:00
addons 100% |=========================| 951 B 00:00
Reading repository metadata in from local files
Parsing package install arguments
Nothing to do


Ok i've done that now what?

When i use the start command for the screen i get this error

[css@vps ~]$ screen -x css-server
There is no screen to be attached matching css-server.