Ikea Stuva - Install back panel

Hello dear forum community,

we have just purchased some Ikea Stuva cabinets. The back panel cannot be slid down into the groove in any way. This worked much better with the Pax back panel.

Does anyone have any idea what we are doing wrong here?
Thanks for your tips and help

Back panel upside down? Otherwise, you really can't go wrong.

We feel exactly the same. The back panel simply won't slide in. It is the large, tall cabinet. According to the instructions, it should be easy, but with us the panel keeps slipping out of a rail in the middle and/or gets stuck just before the top part. It's so frustrating. All parts are the right way round, that's not the issue. Four of us are working on it and it still doesn't work. I've never experienced anything like this. Did you manage it in the end, ale77? We urgently need tips.