Infuse problems when I need srt from opensubtitles

Dejar all,

Today I buy your infuse for my Ipad air.

I have avi files in original versión, by example The Bridge season 2. I search the subtitules in english or spanish, but nothing apears inside infuse! the list Is empty.

I tried with other TV shows, as the walking dead, and found a list of subtitules without problems, why not whit the Bridge? The srt files apears in the web subtitules org but not in infuse… Do you the reason?

Thank you for your help.