How to view external subtitles of a movie 32PFL3507/98

I bought a 32 LED TV model of 32PFL3507/98 and yesterday i tried to watch a movie
using a USB pen.There were the film (in avi extension) and subtitles file (in srt extension) with the same name.

However...........

I couldn't see subtitles on the movie...

Plz help what can i do to see subtitles in a movie when using USB pen.:(

sorry bro but external subtitles can not be used on this tv. maybe you can llok for an external media player like the philips hmp devices they can use subtitles