with out accesskey how to done the code changes? Is it possible?

hi friends,

        i have small problem, please suggest me what i do now..

   in my company i have access development 666,999 clients. developing the code in 666 client it is always change mode, and

999 this is also developing but display mode only.

          in my requirement i want use program MB51, so iam copy the MB51 coding to my Z program, In includes also i changed the

name and copy the coding from standard include and paste the Z include in my program, after some changes i done in my Z main program and Z include

program also. what changes i done in Z include that changes also effected standard include Program. how it is possible?

Main Standard(Mb51) program no changes, but include only changed , how it done? i am not using access key also.

where i done mistake?

Now standard program is not working. what i do now?

i want to change standard include. it is possible with out accesskey?

If know any body please suggest me.

Thanks

  Priya