MPEG4 Subtitles on LVW-1107HC1

I having problem with the MPEG4 subtitles in my LVW-1107HC1.

When i play Divx / Xvid with .SRT subtitles i have thw problems:
1- The size of the subtitle is very small, and difficult to read;
2- The characters with accents, like “é á ç ã” are not displayed properly.

Anybody have the same problem ? There is a way to solve it ?