Some issues with WD My Cloud 4TB


First of all my english is very low, sory about anything…
I had a WD Book Live 2TB full of movies and 2 LG SmartTV working fine the subs working fine, and all movies were accessible, with .mp4, .avi, .mkv, etc… Now I have a WD My Cloud 4TB single bay and they don’t read srt files. Some movies doesn’t apear in the drive, and some are identified as music.
fw v04.05.00-342
Twonky 7.2.9-15
Please can anybody help me?

Luis R.