Wind waker game speed changes every 5 sec

[Syrell88]

hi!

i've got a problem with dolphin 3661 and wind waker! The game is running very well and the sound is well too! But the gamespeed differs every 5 sec from slow 50% to 90% ! in rooms sometimes till 150%! i set the frame limit to 50 oder 60 but it doesn't help! it's hard to get an countinoues playtime! Do somebody has an idea=?

thx Syrell