That's odd. It is only supposed to do this once.
It sounds like you've got a problem. I'm not sure how you can fix it or what would cause it. Perhaps someone will get back to you with an answer, but in the meantime I can suggest a work-around solution. Uninstall your client and install
BitTornado. It has no beg screen, ever. It also has many more features. Honestly, it is better than the mainline client in every way without having a radically different UI or being too complicated. I wish I could solve the problem you specify, but at least this isn't a downgrade.