please help for 轉檔

lingling

i use (Xilisoft 3GP Video Converter 3.17繁體中文版)
  E7 c& _3 ~- mi tried AVI 轉 RM,but it no picture,just got sound8 j6 @" V7 ]; y  G7 V$ Z) c; g. e
don't know what wrong?+ Y9 v- J4 E+ X- j* P
why i want 轉 RM,because my hard disk full already
0 w5 i. i6 p, I  f+ f% x3 j公仔箱論壇please help................