How to step into a shared function

Hi, I am trying to step into a shared function by pressing F5 in IDE 6.2.1
debugger, but it steps over the function. I could do that in 6.2.0. I am
running IDE on XP host. Can anyone tell me how to do that in 6.2.1? Is there
any document which explains the usage of each field in Launch Configuration?
Thanks.