[HELP] Subtitle track "too small"

[dkpanda]

Hi, I'm trying to pass through a subtitle track from my source file that was ripped from a MiniDVD, which contains info on the date and time as a little toggleable overlay on the source file. When I try importing the file into Hybrid it claims to be "too small," leaving me with no sub to work with:

Started a subtitle extraction for source: 1
Ignored and deleted '[FILE]_id_2_lang_en_default.idx' too small!
  Finished subtitle extraction for E:\Videos\DVDs\[FILE].mkv

Any way to let Hybrid accept the track? Thanks!