PCSX2 - Sounds 100% speed but video is not.

[Tyraxx]

Hi everybody,
as the topic already says, I have a problem with two games (same series).
The sound works at 100 % speed but the video is really slow. So of course it's really troublesome to play.
Actually it's a novel-game (the one with a lot of talking) so it should work fine, since all other novel-games (how are they called anyway?) do work perfectly.
To be more specific, I'm having this problem with these games:

Mahou Sensei Negima! 1-Jikanme ~Okochama Sensei wa Mahoutsukai!~
and
Mahou Sensei Negima! 2-Jikanme ~Tatakau Otometachi! Mahora Daiundokai SP~

BTW, I'm using the pcsx2-r4600 with the following settings:

Spoiler warning: