DVDStylerPortable crash on adding subtitles

i add the movie Twilight[2008]DvDrip-aXXo.avi
video:
codec: Xvid
resolution 656x246
fram rate: 23.976

audio:
codec: mpga
channels: stereo
Sample rate 48000 HZ
Bit Rate 96 kb/s

i have Windows XP sp3
i have hp pavilon dv4000
CPU Pentium 1.73 GHZ
ram 512 RAM

Error Signature:
AppName: dvdstyler.exe AppVer: 0.0.0.0 ModName: dvdstyler.exe
ModVer: 0.0.0.0 Offset: 002bfd44

pls help me with that crash!!!
thx tal