Cross fader not working on a behringer ddm4000

Cross fader not working on a behringer ddm4000

I have a behringer ddm 4000 mixer that I bought from zzzsounds and it’s a warehouse resealable which means it’s lightly used. I’m using the Denon ds1 interface and 2 stanton str8-150 on serato dj. So when I have this mixer on the channel faders / volume up and down work for each channel but the cross fader doesn’t work. I wonder if it’s a setting on the mixer since it’s loaded with settings or if it’s a setting in serato? Any ideas ? I’m pretty new to both and I don’t see a setting so am out of ideas. I do run a numark m2 mixed and that works fine so it’s not the ds1, please help.

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CF On button?

Let me check …

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Yeah it’s on and no luck…

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If CF button is On, and your decks are assigned to CF, might be faulty equipment. Behringer doesn’t exactly have the best name in any industry

Yeah I see about the reputation but if you look at the rep on that ddm-4000 it’s surprisingly has good reviews. I started an RMA with Zzsounds and I’m sending it in though, I’ve spent too much time trying to get this workings. I asked them if it was tested since it was used, they obviously said yes but I think I was the test, lol. I’m using a cheap numark m2 for now , it does the job I guess. If anyone can come up with any other ideas , let me know. I really would like to keep this thing but it’s gotta work.

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Have you assigned all 4 channels to a side of the crossfader (A/B) using the CF Assign Toggle Button on each channel?