You mention a CST and 430EX, but you do not mention a CSRB, which is required as well.
The wireless settings in the flash rely on optical triggers from a master flash, like a 580EX or ST-E2. The CST produces a radio signal, and is not compatabile with the built in wireless system of the flash. The Channels of each are more or less arbitrary, and do not correlate in any way to each other. The remote setting on the 430 should be set to off. You should also have the 430 in "M" mode, as you will not have TTL communication.
Incidentally, the 430 does not have a means of connecting directly to the CSRB, so we recommend getting the SLFA (speedlite foot adapter) in our hardware=>parts and acessories page
http://www.alienbees.com/remotes.html http://www.alienbees.com/parts.htmlOther than the SLFA, the above is true with any speedlite (actually any flash, even ours, will need a reciver of some sort to work with the CST). Any radio remote system will require a seperate reciever on any speedlite, and the same holds true with most studio lights as well (though some studio lights have a radio reciever in them, but there are pros and cons to that set up).