Thanks for your comment.

I 'd like to re-explain my problem.

Senario 1:

When no perl510.dll existed, The application will fail to set up due to it can not find perl510.dll.

Senario 2:

When I put the perl510.dll into the same directory as the application. The application can set up, but the PERL script seems not to be interpreted rightly.

Anyway, I will have a try following your advice .