Pto midshaft

[3030trapper]

Hello, was wondering if anyone could help with an issue im having. Was mowing with a bushhog. Shut everthing down come out later and pto wouldnt engage. Mid shaft is turning strong and wont disengauge. Lever clicks in all 3 positions. Pto. Pto/midshaft. And mid shaft only. Iv changed both filters and replaced oil and pto switch with no success. Tractor is a Kubota b3030 around a 2003 400hrs. Thanks for any kind of help.