Why rsh not opens and reads PAM modules and limits.conf?

I am working on a project, that uses rsh utility for remote connection. But my project needs some extra features for that, so I add that features. Till now, all the things are going fine. But when I take a strace on rsh server. It shows that it opens and reads PAM modules and limits.conf. But the rsh, that I made is not able to open and read PAM module and limits.conf. I followed this link to check above things. Number of calling of PAM module and all these things are exactly same in Standard rsh and mine rsh. **The reasons that I think, behind this weird behavior** :- 1. May be configure file does not load by makefile of mine rsh. 2. May be it does not load MCONFIG , MRULES in makefile. But I didn't understand how can I confirm my doubt, and remove this problem. I tried to use GDB debugger, but I am unable to locate where this problem occurs.