Screen saver not running. Task execution paused...
This message is only displayed when you have selected Run only as Screen Saver in the Device Options section of the Preferences window. When Run only as Screen Saver is selected, the Agent only runs when the UD screen saver runs, as specified in your Windows screen saver settings.
ということで、kozou さんは、設定で 「スクリーンセーバのみで UD Agent を実行」にしていますね? (チェックマークのボタンで、Device Options の " Run only as Screen Saver ")