Access Control : Gate Access : Configuration : Troubleshooting:
 
Troubleshooting:
 
If IIS isn’t running, you get an “unknown ticket” from the gate.
If the app pool can’t run ww.dll, you get an, “ERR” returned when you scan a ticket.
If while installing there is no asp.net section present on IIS, go into the Control Panel to turn on Windows Features and check asp.net here:
 
 
Also set:
 
 
Install .NET Framework 4.0 Full