Checkout by Paypal

Hi I have installed the latest gallery 2 version which is gallery-2.2.4.

Then I have downloaded the Checkout by Paypal module version 0.1.9.

I have click on install button for the paypal module.

And I am getting the following information (error):

Error Detail -
Error (ERROR_STORAGE_FAILURE) : No map or entity description for: CheckoutPaypalIPN
in modules\core\classes\GalleryStorage\GalleryStorageExtras.class at line 1307 (GalleryCoreApi::error)
in modules\core\classes\GalleryStorage.class at line 740 (GalleryStorageExtras::configureStore)
in modules\core\classes\GalleryModule.class at line 146 (GalleryStorage::configureStore)
in modules\core\PluginCallback.inc at line 236 (GalleryModule::installOrUpgrade)
in modules\core\PluginCallback.inc at line 73 (PluginCallbackView::handleCallback)
in main.php at line 433 (PluginCallbackView::renderImmediate)
in main.php at line 94
in main.php at line 83

Please help

Thanks