I would reccoment using the start command like this

my $rv = system("cmd /c START C:\\YourPath\\Here\\t.pl"); Then just make sure the registry associates the file type with the perl interpreter.

To set your file association in WindowsXP

1. Open Windows Explorer
2. Choose Tools->Folder Options
3. Select the File Types tab
4. Check for an entry with Extension PL

5. if(exists($entry))
   {   $double_check_association = 1;
   }
   else(!exists($entry))
   {
       $add_new_entry = 1;
   }
   [download]

6. To add a new association click the "New" button, Enter the extension and then choose the program that should open it