Instead of webAlert() (which I think may be gone), try this:
Make sure the plugin is not disabled.
And you definitely don't need the if statement (but don't forget to remove the matching curly brace at the end of it).
Plugins with a syntax error will often just hang, so pasting the code into a good code editor is always a useful check.
I have plugin debugging code for Revo that writes debug output to a chunk called "debug" but I'm not sure what it would look like in Evo.
If die() shows that the plugin is executing, feel free to post your plugin code here.