Problem showing subtitles

[Skyhacker]

Hello I bough a WD tv mini today anda have lots of problems with subtitles, I’m in portugal have the device language and subtitle language to portuguese and updated to the last firmware (1.00.60), the srt file is exacly the same name as the avi file but it just won’t show the subs

any help would be apreciated 

[Ardvark]

What type of video file?