So a couple weeks ago my Eclipse IDE no longer allowed me to remotely debug my application saying that it was unable to install breakpoints because line numbers were not be
I think you may want to try adding -g to the compilearg in your ant build.
Also if you are unsure if break points are working just put a break point in an early point in your code that you know is getting executed. you can also add a print statement to ensure that the break point is being passed by.