Zetor 3011 lift problems

Hello Guys.
I have a Zetor 3011 and it runs like a dream. There is though a problem. I had been using the scraper to fix the driveways on the farm, scraper mountet in the 3 point lift, working well. Parked up the tractor for the night.

2 days later i would do some more scraping, started the tractor, lift was up, and all was ok. Drove to the destination no gear problems no mis sounds. Lowered the lift, drove of in 1. gear. stoped and wanted to raise the lift... NOW !!! no funktion. lift arms are totaly dead....
Im almost certan that i have not put anything out of gear ( pto / hydraulics pump)

when i move the lever it feels normal, but no function.

when i move the other lever besidt the lift lever i can hear the hydraulics making a little pressure inside the body somewhere.

checked oil levels ok.

Can anybody give me the golden solution

thanks in advance

external hydraulics is working, so most probably you should set the flow divider under the seat (a flat tab lever) all the way to the other side, so it will put full oil to the 3pt lift.