[WiX-users] Windows Installer won't remove existing during upgrade

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I'm trying to properly implement an upgrade (minor version number change
which should trigger a replace).

However, Windows Installer leaves older versions installed without touching
them (Leaves the program files behind and the Uninstall Programs reg entry).

I'm using the same upgradecode for all versions and always changing the
product and package codes.

I've tried to implement this the following way:
<Upgrade Id="UPGCODE">
  <UpgradeVersion Property="DOWNGRADE" OnlyDetect="yes" Minimum="VERSION"
IncludeMinimum="no" />
  <UpgradeVersion Property="UPGRADE" OnlyDetect="no" Minimum="VERSION"
Maximum="VERSION" IncludeMinimum="yes" IncludeMaximum="no" />
 </Upgrade>

 <InstallExecuteSequence>
      <RemoveExistingProducts After="InstallFinalize" />
</InstallExecuteSequence>

>From the logs I can see it runs but I don't know it if attempted to do
anything:
MSI (c) (74:58) [12:32:12:069]: Doing action: FindRelatedProducts
Action 12:32:12: FindRelatedProducts. Searching for related applications
Action start 12:32:12: FindRelatedProducts.
Action ended 12:32:12: FindRelatedProducts. Return value 1.
...
DEBUG: Error 2911:  Could not remove the folder C:\Config.Msi\.
The installer has encountered an unexpected error installing this package.
This may indicate a problem with this package. The error code is 2911. The
arguments are: C:\Config.Msi\, ,
MSI (s) (BC:80) [12:32:27:466]: Note: 1: 2318 2:
MSI (s) (BC:80) [12:32:27:466]: No System Restore sequence number for this
installation.
MSI (s) (BC:80) [12:32:27:466]: Unlocking Server
MSI (s) (BC:80) [12:32:27:544]: PROPERTY CHANGE: Deleting UpdateStarted
property. Its current value is '1'.
Action ended 12:32:27: InstallFinalize. Return value 1.
MSI (s) (BC:80) [12:32:27:544]: Doing action: RemoveExistingProducts
Action 12:32:27: RemoveExistingProducts. Removing applications
Action start 12:32:27: RemoveExistingProducts.
Action ended 12:32:27: RemoveExistingProducts. Return value 1.
Action ended 12:32:27: INSTALL. Return value 1.