Explosion not working

I've been trying to make a remote controlled explosion. I've made a block, which, when placed sets its coords as variables. I then made it so when I right-click with a remote, it opens a GUI. In the GUI, when I press a button, its supposed to make the block explode, but it just doesn't. The explosion is set to occur at the coords of the block (so, X, Y, and Z are defined by the above mentioned Variables), and the Procedure simply does not run. It is set to happen when the button js pressed in the GUI, but it doesn't. Any help?