Reloading of classes in a project

I've noticed that something has changed with my project and the classes that are now being compiled are all read only. This seems to be a problem as classes that I attempt to reload on the fly or recompile are not up to date the next time I run, ie the breakpoints keep saying that there is no executable code for a line with code and a border I add to a panel doesn't appear. Any idea how to fix this?

Thanks,
Jeff