Clamping kick pedal to strike bass drum

G'day guys and girls!

When I go to clamp my pearl double pedal to the strike bass drum plate, I can't clamp it all the way forward because part of the pedal rubs up against the rim of the drum. I've been having to pull the pedal right back and only clamp to a little bit of the plate which constantly causes the pedal to slip away from the drum. Has anyone else had these dramas or have any ideas?
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