When you layout the backing of the quilt, be sure to tape or clamp it so it is stretched very smooth and tightly. I lay mine on the floor and tape it. Some ladies have big tables and can clamp it to the table.
Lay the batting on top of the back and make certain it is smooth. I tape my batting to the floor, too. Some ladies use a spray on basting product.
Lay on the top and smooth it out. Then you need to baste it all together. I use safety pins. LOTS and LOTS. Some people baste with needle and thread, others use the spray basting.
If you get it all smooth and tight before you quilt, it should work OK.