Ring Puzzle challenge

A simple puzzle that may pose a larger challenge than expected. but i believe you guys and gals can solve it.You will need a length of string (approx 12") that will not pull through the small knobs once knotted. There are two methods to challenge youself with this puzzle: Tie the ring on to the puzzle when assebling taking care to ensure the string goes over and under the ring and string crossing as shown in the picture. Then attempt to remove the ring. ORassemble the string to the base plat