Did you turn on Large Deflection?

Did you turn on Automatic Time Stepping and set the Initial Substeps to 100?

Did you insert a Contact Tool under the Connections folder and generate the Initial Contact Status?  All the contacts must be closed or near.  None can be Far Open or they will be ignored. Please check that if you haven't already.

If you want me or someone else to take a look at your model, create a Workbench Project Archive .wbpz file and use the Attach button which appears after you post your reply.