Uninstall MSI application using msiexec command in a program package - 1603 Exit Code in Execmgr.log

I cannot get this to work like I used to in SCCM 2007. 

I simply create a package that has a program where I use the following syntax to uninstall an MSI app:

msiexec.exe /x {GUID} /qn

Am I missing something here?

Thanks