You're really going to have to do some debugging here. You're writing code, so you need to step through it and see what's happening.
debug: true isn't going to do much for you in this case. Even if the variables aren't set, they will end up undefined, which will pass a value to the update. You should look at the network traffic in Firebug or Fiddler to see if the calls are in fact working.
M.
debug: true isn't going to do much for you in this case. Even if the variables aren't set, they will end up undefined, which will pass a value to the update. You should look at the network traffic in Firebug or Fiddler to see if the calls are in fact working.
M.