Ah ok, I misunderstood then (I thought that the problem only occurred while testing in Store Closed mode ). During installation - which is already quite a while ago - I chose the built-in database because my shop is simple with only a few hundred products. Besides that my knowledge of SQL is near zero so that seemed the best way to go for at the time. Strangely enough I did not see the Scheduled Task error earlier, although I have gone through the admin options numerous times setting up the shop. I'm going live this weekend and I can live with not having the option to send emails manually since all automatic emails are being sent. But I'm having fears now that something unexpected turns up causing bigger problems, although everything else seems to work fine. I don't see how I could change my installation at this point.