Does anybody know how to solve my problem ???

When I play SVCD on my Daewoo DVG-5000D (same as DVG-5000N)
no problem , but when I use FF or "pauze" the sound delays a few seconds.
I tried everything like lower bitrate and lower sound quality, but nothing seems to work.
The only thing I haven`t tried is new firmware because I donīt know if thats useful.