WMI query problem

I'm trying to run the following wmi query:

select ProcessId,Name,PageFileUsage from Win32_Process where ((Name = 'sqlservr.exe' AND CommandLine LIKE '%-sMSSQLSERVER%'))

I can do this with a local admin account, but not with the non-admin account I created.  If I remover the 'CommandLine Like' part of the query it runs fine.  This account is set up to run WMI queries and pulls everything else I need so far except this query which lets me see into my SQL Server instances.

Any ideas or suggestions are appreciated.