Hi eminempark,
Loops scripts works, you need to learn to troubleshoot for yourself at some levels.
If the error you are getting flashes on the screen, then you can simply make that stay to see which line the error occurs and what error is it. Simply use <> at the end of your script.

Of course, the error I suppose you are pointing at I think is caused by the usage of qw(:all) in the line that uses autodie. You can take that out and see if it works for you.
Please, check the documentation for the "autodie" pragma, the reasons were given atleast!