you have an issue when your system is started u have to manually start the application even if the application is set to automatic.So here is the solution..
Open Control Panel; Select Administrative Tools; Right Click on Services and send it to the Desktop as a shortcut.
Now, open Services.
Find the CF 8 Application Server line and Right Click on it, and select Properties.
On the General Tab, make sure the Startup type is Automatic.
On the Recovery Tab, make the following entries:
First failure: Restart the Service
Second Failure: Run a program
Third failure: Take no action (I figure by this point, I have to do it manually!)
Program: Click the Browse button and find the jrunsvc.exe module.
Mine was under C:\inetpub\wwwroot\runtime\bin\jrunsvc.exe
Command line parameters: "ColdFusion 8 Application Server"
After you Apply the changes, click OK, then you might as well start the service while you are here. On your next boot, it should start up!