Learn how to install things properly.

Perl modules that require C extensions cannot be easily copied if you don't know what you are doing.

LibXSLT.dll requires other DLLs from the libxml package. If you don't know which ones, I recommend you keep the Perl 5.6.1 you already have working and copy that one instead of trying to move to a newer Perl version without the capability of installing all required modules.