custom download url does not work

hi,

i tried out this plugin on a localhost, and it worked as advertised. when i ported this to the live server, the plugin works only if i don’t use the “custom download url”. if i use the custom download url, i get redirected to a 404 page. (i did not set that up in the config). i think this relates to a few lines to redirect to download.php not present in my htaccess file. i edited the file as instructed, but wasn’t able to resolve the issue. please help!