VCR won't output color in S-Video but will in composite

[Hamilthon]

Hi,
I'm currently trying to capture SECAM VHS tapes (I'm in France).
I currently use VirtualDub to capture the VHS, works like a charm.
My VCR is an Akai VS-G460 (Pro GX4) it's in great condition and works perfectly.
It has an SCART output, I plug an SCART adapter inside, which allows to output SCART to Composite/S-Video and vice-versa.
This kind of adapter : https://batterie-boutique.fr/media/image/41/95/41/2b8594f6-5630-4996-b2b9-66c3c95386ff-50312-tif.jpg

The cables are not faulty, neither is the adapter.

In VirtualDub, I could capture the color with composite but whenever I go into S-Video mode I can't.
Aside from that S-Video works on my Hi8 Camcorder and the S-Video outputs color.
To be sure the S-Video output works on my VCR I plugged it into my CRT and the S-Video outputs color.
I checked PAL_B, SECAM_B, SECAM_L. Nothing is colored in VirtualDub.

Where should I investigate ?

I looked around and some told it had to do with the NTSC playback on PAL VCRs.
My capture card is an August VGB100 by the way.

Thanks for considering

[Brad]

Unless your VCR has a menu setting to enable S-Video via SCART, it won't output S-Video via SCART. Only S-VHS machines will do this.

The CRT is probably decoding the fake "S-Video" signal as composite.

[Hamilthon]

I checked by unplugging the yellow composite cable to see if S-Video would output the image and it does.
The thing is as I get a black and white image on my VCR
while I have a full colored image by plugging my S-Video cable in my CRT.
(By using the same cable setup, S-Video plugged, nothing else.)

[themaster1]

like previously said if it's not a s-vhs deck (with a button or on the main menu to commute composite<>s-video on the euroscart) it's a lost cause.
Just use composite