evaluate express on watch breakpoint

Hi,

Jswat is really a cool product. Thanks very much for creating it.

While I am debugging one of my projects, I found I couldn't evaluate any
java expression (or any simple math expression) when I created a variable
watch breakpoint (on Modify). There is nothing output on the debugger
console. I don't see the java expression showed up in either Watches or
Evaluator window.

I can evaluate a java expression when I set breakpoint on line number, or
I can set watch on variable modification alone (it outputs the result in
Debugger console). But combining these two (which is allowed by entering
the expression and ticking the Evaluate expression toggle on Breakpoint
Customizer popup), it didn't work.

Is there anything I did wrong? I am using Jswat ver 3.11 and I also attach
the session via socket as the project is multi-threaded.

Thanks for your help.
Jim