Thick vertical bars on Vewlix using scanline generator

[jugu]

Hi folks,
I decided to add a scanline generator to my Vewlix tate setup. I tried both an orginal SLG 3000 and a mini SLG. The setup is:
Taito Type X2 --> DVI/VGA adaptor --> VGA Cable --> SLG --> VGA Cable --> Monitor
Both produce a verticial jailbar on screen, as seen in the attached picture.


Here's what I've tried to try and eliminate or minize these bars:

• Set monitor resolution from 1366 --> 1280 --> 680
• Set monitor from Widescreen to Full
• Set Taito Type X2 to 640x480 via #2 Dip switch
• On the SLG3000, alternated between even and odd scanlines

Is there something I'm missing here?

Thanks in advance!

 

[SNK-NEO-GEO]

I used a Toro on the new monitor and the scanline looked very good..
what? .25 Vewlix????