Hi Roman,
I executing a program through SE80 to debug,by default my debugger mode is classical so if i open a program to debug its open in classical debugger and as a next step if i switch to new abap debugger mode, my system become hang(not responding).
STEP 1:-
se80- selecting the program-->programs-->test-->Debugging
Step2:-
Program will debug in classical mode-->Debugging-->Switch to New Abap debugger -->System become hang.
Regards,
Vinodh