Trim Control Problems with DDJ-SR in Serato

hi!

i have a problem with my trim control knobs. i have auto gain turned on in serato, but it will always be too loud and the volume level in red. if i move the trim control on my ddj-sr, serato wont recognize it and the virtual trim control stays where it was. so if i wanna know if i am in red or green, i always have to adjust the trim with the mouse in serato. how can i fix that? i dont know if this is a serato or ddj-sr problem. i have the latest serato software and i use windows 10 on a sony vaio.