Extension Builder 2.0 and InDesign CS5?

Hi,

I recently tried to create an Adobe Extension that uses host adapters. But after exporting the extension and installing it with the Adobe Extension Manager CS5 I got an error message during startup of InDesign that the host adapter is not a valid plugin. Is it possible that the Extension Manager 2.0 does not support InDesign CS5 with host adapters? Because the plugin without the host adapter works. Or do I need older host adapter plugins? If yes, where can I download them?

Thanks a lot,

Martin