You need to use Encode like this:

use Encode qw/from_to/;
...
from_to( $_, "cp1250", "utf8" );
...
[download]

Alternatively, you could use it like this:

use Encode;
...
Encode::from_to( $_, "cp1250", "utf8" );
...
[download]

This is because by default, Encode does not export the "from_to" function into the "main" namespace of your script.