I use a pizza screen every time I make pizza and do not have any trouble. Take a look at my thread.http://www.pizzamaking.com/forum/index.php/topic,17415.340.htmlA few suggestions for you:
I press out my dough on my counter top and I have put enough flour on the surface to help the dough not to stick so much. (if you do not have a counter top to work on, then get a plastic or wooden board.) You will have to flip the dough over and press it out a few times till you reach the desired size pizza circle. (Place the pizza screen over the pressed out dough to see how close you are to the correct circle size.) It does not have to be perfect, as you can shaped it.
Then place your dough onto the pizza screen. See if you can take the dough off the screen once before you start putting toppings on your dough. If it is already sticking, then you need some flour on it.
In most cases, mine never sticks to the screen. Again, make sure your dough is not that sticky when your ready to place it on the pizza screen.The worst thing you can do is press the dough into the screen. The dough will bake into the screen.
I cook my thin crust pizza at 425 for 15 mins. (Adjust to your oven) You should not have any sticking to the screen. Pull the pizza off the hot screen with tongs when it is finished cooking.