Fixlet Authoring : Uninstall Autodesk silently

Hello Everyone,
Could you please suggest how to execute the uninstall string with silent parameter " /q" ? i am executing the below action script through fixlet debugger but seems like silent parameter is not added at the end.

Wait {values “UninstallString” of keys whose (value “displayname” of it as string contains “Autodesk AutoCAD” of it and value “uninstallstring” of it as string as lowercase contains “.exe”) of key “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall” of native registry} -q