Problems installing my walking foot

Please help me to figure out why I cannot get my walking foot to work on the Singer machine I have. I attached it but when I lower the lever on the presser

Blog & More Tutorials & Guides How To Attach Your Walking Foot (and other Screw-On Feet) to Your Sewing Machine

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JUKI DNU 1541S WALKING FOOT

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5 SET WALKING FOOT/ FEET for JUKI LU-562 563 1508, 1508NH DNU-241 1541

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Blog & More Tutorials & Guides How To Attach Your Walking Foot (and other Screw-On Feet) to Your Sewing Machine

4020SW Video