Agnes,
VFP keeps programs in cache to improve performance. Sometimes VFP gets confused and runs an old or as in your case a different version. I did some testing and found that when I specified the path (e.g. DO DirA\MyProg, DO DirB\MyProg), everything worked ok. However, if I changed the path between the calls and then simply called the program without specifying the path (DO MyProg), VFP got confused and executed the wrong program.
To solve this problem, you could call the following command which removes the compiled programs from the cache:

CLEAR PROGRAM
*-- call your program

>Did u meet this b4 ?
>'same database name, same tablesname but within two different directory' A,B'
>
>I got a program in C directory which will call A's program, B's program.
>As C's program call A's prg, it returns the correct result.
>Now.In the next step, C's program will call B's prg , but it returns the A's result..
>
>Before Call B's prg, I have set path to B's path..
>
>so. How can i correct it ?
>
>
>Thanks