Divx / Xvid Subtitles on LVW-1107HC1



I having problem with the Divx / Xvid subtitles in my LVW-1107HC1.

When i play Divx / Xvid with .SRT file the size of subtitles is very small, and very difficult to read.

Anybody knows how to increase the subtitle size and if its possible to change its color to yellow ?