UserVars.ESXiShellTimeOut

i am having problem with UserVars.ESXiShellTimeOut

$Shelltimeout

$Shelltimeout.settings is blank.

but

Get-VMHost | Get-VMHostAdvancedConfiguration -Name uservars.esxishelltimeout

works just fine

Name                           Value
----                           -----
UserVars.ESXiShellTimeOut      0
UserVars.ESXiShellTimeOut      12000

Esxi 5.0 version..

thanks for all the help!