Install of SAP BI4 SP2 - Failed to listen on port(s)

Hi,

When carrying out a brand new install on a clean server I get the following error

Server cms_SERVER.CentralManagementServer

Name Service Port

Failed to listen on port(s): XX.XXX.XX.XXX:6411, SERVER:6411.

Any ideas what the problem may be? I have tried ports 6400 and 6411 and same error. So I dont think it has actually anything to do with the ports but something else?

Thanks,