Help noob with aluminum

[MrMega]

I recently purchased a power tig 200dx. I've managed to get the hang of welding steel and even welded some copper, but I am having a terrible time with aluminum. I am just trying to put some beads on some 1/8" flat bar but it just isn't working. As soon as I get it hot enough to get a puddle or melt the filler rod it simply melts a hole through the material. I've tried different settings with the frequency and AC balance but it is always the same result. I have adjusted the gas flow and cleaned and re-cleaned the material with no success. I have attached photos of the top and bottom of the bar. The bubbled side is the bottom. Please help if possible.

Thanks,

Forrest