Unix Installation error

We are having some trouble installing BOXIR2 in unix, the following error is thrown during the installation

Initialization of components completed.

Updating configuration entries...

Now updating entries...

Initializing db...

Starting CMS

Abort - core dumped

Registering license key...

err: Error: Couldn't create Environment object.

err: Error description: Unknown error

Now launching all servers...

XvfbDaemon: You have another XvfbDaemon running

err: Error: Couldn't create Environment object.

err: Error description: Unknown error

Error: Unable to start CMS server.

Now enabling all servers...

err: Error: Couldn't create Environment object.

err: Error description: Unknown error

err: Error: Couldn't create Environment object.

err: Error description: Unknown error

err: Error: Couldn't create Environment object.

err: Error description: Unknown error

System exception `COMM_FAILURE'

Reason: no such host is known

Completed: no

Minor code: 1330577422 (gethostbyname() failed)

HRESULT 8000ffff: Internal error: Unable to initialize the session manager.

CMS = erdev03:6400, user = Administrator

[InstallEntSdkWrapper.main] Connecting to CMS erdev03:6400 as Administrator

[InstallEntSdkWrapper.Connect] Exception: Server erdev03 not found or server may be down

[InstallEntSdkWrapper.main] Could not connect to CMS

[InstallEntSdkWrapper.main] Connecting to CMS erdev03:6400 as Administrator

[InstallEntSdkWrapper.Connect] Exception: Server erdev03 not found or server may be down

[InstallEntSdkWrapper.main] Could not connect to CMS

Preparing WAR files for deployment...

Deploying WAR files...

Starting Tomcat now...

We tried using an existing database and using a new database for CMS, in both cases we got the same result.

Any help would be much appreciated.

Thank you in advance.