The initial mistake i did,
* Do not forget to set the path after installing ns2. No matter what, how many times you try it won't work. You gotta set the path. The best way to ensure that you installed ns2 correctly is, try enabling the hello packets. click here
* Compiling process, after modifying aodv files. click here* Not reading this basic aodv tutorial click here.
Do share your mistakes in the comments...