Hello everybody

My problem is that my pinky really cramps up when i use my ring finger.
For instance when i try to play with my first and ring finger my pinky flies away from the fretboard and start cramping and curling... but when i use all my four fingers everything is fine...
i only have this problem when i use my first and third finger or second and third.
My fingers are pretty strong and i practice finger strenght exercices every day so i think it's not a strength issue.

Is there any technique to relax my pinky when i use my ring finger to prevent the cramps???

Thank you