Quoted from cfh:And if the tower isn't well insulated and cold (sometimes via an internal fan), the first couple of pours will be foamy
Once you figure out your ice & flat beer problems, this will probably be the next thing to tackle to help with the foam issue. Even with an insulated tower, I had to blow air up the tower (I bought a kit specifically designed for this but I've heard a cheap computer fan will do the job as well) to keep the lines cold all the way to the tap which significantly reduced foam.