Putting up fabric on the inside roof

I went to Wal-Mart and bought some fabric that I thought would look really car on my car's interior. Now I need to do the roof. First, my car is a convertible and the top is canvas. My question is, what is good to use for keeping the fabric up? I tried using Elmer's Craft and Fabric glue which is a spray-on glue. I also tried Velcro strips made for fabrics. I'm getting pissed because neither work. The velcro won't stick and the Elmer's glue loses it's stickiness once the sun comes out and heats up the top. So I need something that won't react to the heat. Help me ya!!

Call a local automotive trim shop or one that specializes in installing convertible tops . They should be able to steer you in the right direction . Good luck !