HELP....with mixture machine!!

[morph]

okey i understand...but what is the order that i need to push on the buttons?....

here see this:
http://img137.imageshack.us/my.php?image...613rz3.jpg

Aw bloody hell... Doesn't do anything for either. "Mixture not complete" or something... What am I missing? I have the substance nr whatever from the chem lab inserted and have put a load of chemicals into the machine, no avail. Now I'm quessing that maybe I haven't found all the basic chemicals (bromine maybe) yet. There was shitloads of the stuff at the examination room itself but I think I found one tube from the main corridors perhapes. What am I missing here?