Newbie problem with debugger showing eval() in stack

Hi,

Due to a problem with a ruby application, I am trying to use ruby
rdebug-ide with netbeans.

It seems to be working, and breakpoints work, except in one class where
breakpoints don’t work, and if I step into a method of that class,
source isn’t shown and stack shows eval() , but giving the line number
of the classes source file, instead of showing the correct class and
file.

similarly if I don’t run in debugger and I get a crash, in the backtrace
I get

(eval):536:in block in on_invite' (eval):533:ineach’
(eval):533:in on_invite' c:/test/base_controller.rb:330:inon_request’

Can anyone suggest any clue as to why its showing eval() and not showing
source file.

Thanks
John