Listen for the tell-tale ‘click’ that lets you know your car seat base and infant carrier with stroller frame are fully attached — and ALWAYS lift up on the carrier handle to check that it’s secure. If you are having difficulty connecting your Shyft DualRide to the base, you may need to double-check that the stroller wheels are properly folded. Remove the infant carrier with the stroller frame, then unfold and refold your wheels, and try clicking into the base again. Also, be sure to double-check the central front adjuster (CFA) strap between your child’s legs to make sure it is not blocking the connection to the base. An elastic loop is provided at the end of this strap so you can roll it up for out-of-the-way storage.