Does your machine have an address? If not assign it one and use that.
In the address bar of internet explorer, type http://220.127.116.11, where 18.104.22.168 is the ip address of the Orion server. Does the login page display?
If not, please go to Start -> Programs -> Solarwinds Orion -> Advanced Features -> Orion Service Manager.
Are all services listed as Running? And the IIS web site?
Click Start -> Administrative Tools -> IIS Manager.
Click the + to expand the IIS server and then the web sites. Right click on Solarwinds NetPerMon and select Browse. Does the login page display?
Right click on Solarwinds NetPerMon and select Properties. Click on the Web site tab, what ip address is displayed? What TCP port?