Water Seeps into my Dometic Awning during Storage

I ended up buying 2 sections of PVC gutter and cut to fit. Also bought 2 end caps as well as 1 "connector" to cover the seam. The gutter fits right into the trailer rain gutter and covers most of the awning. I was more interested in protecting it from the hot Florida sun and getting my awning eaten up. It ends up that it keeps the awning pretty dry as well. I even forgot to take the "cover" off one time when I took the trailer out on the highway to test some hitch readjustments...when I got half way home, it was one of those "Oh crap" moments. But when I arrived home, it was still intact! :S