creating a coldfusion service account for a specific user

Coldfusion 8 (on windows server 2008) is currently running as localsystem. I am trying to create a coldfusion service account for a specific user. I created the user and I stopped the service. Under the log on tab for the service I entered the new logon details. I gave the new user account "Read & execute, List Folder Contents and Read" permissions on the "ColdFusion8" and "cfide" directories. I restarted the service and got the following error message (the service runs fine as localsystem or administrator):

500 - Internal Server Error

java.lang.NullPointerException
at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:285)
at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203)
at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)