Add Credit Problem

Hi, I'm Timo Jaeger. I've composed the original score for Line Walker 2 together with Yusuke Hatano. I've tried several times to add my credit for "music by" at the cast section https://www.imdb.com/title/tt10295602/fullcredits/?ref_=tt_ov_st_sm but it didn't work. They only send me this message every time: "Thank you for your contribution to IMDb. The information you have supplied is being processed by our team". After that nothing happens. Can I get help what's wrong? That's my first credit on a movie, so it's really important for me. Best Regards, Timo Jaeger