New Post: Issue with Custom Update

I've made a custom update to install FreePDF, and mod the reg key for the ghostscript version, but it gives me the FFFC error when installing on the client.

A regular update built the same way, minus the reg mod, works.

Here is the .xml from the custom update, could anyone spot what I'm doing wrong?

<CustomUpdate>
<Action>
<ElementType>CustomUpdateElements.ExecutableElement</ElementType>
<PathToExecutable>C:\trans\FreePDF4.14\fpsetup.exe</PathToExecutable>
<Parameters>/q</Parameters>
<KillProcess>True</KillProcess>
<TimeBeforeKilling>10</TimeBeforeKilling>
<Variable/>
</Action>
<Action>
<ElementType>CustomUpdateElements.RegistryElement</ElementType>
<RegAction>Modify</RegAction>
<RegHive>HKEY_LOCAL_MACHINE</RegHive>
<RegKey>SOFTWARE\Wow6432Node\shbox\FreePdfXP</RegKey>
<RegValue>gswin32c</RegValue>
<RegType>REG_SZ</RegType>
<RegData>C:\Program Files\gs\gs9.07\bin\gswin64c.exe</RegData>
<RegVariable/>
</Action>
</CustomUpdate>