Register Websphere as a service

I have installed Websphere 6.1 on Windows but it only registered Dmgr as a service: how can I register nodeagent and the appsrv as well?

Here are the commands to launch:

WASService -add nodeagent -servername nodeagent -profilePath "C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01"

WASService -add server1 -servername server1 -profilePath "C:\Program Files\IBM\WebSphere\AppServer\profiles\AppSrv01"