Share 'Kreg Rip Cut Assembly'

Got my Rip Cut and have done something wrong.  The sled won't slide onto the Guide Rail due to theL ock Wedge being in the way.  Please note that I had a stroke 2 years ago and am using woodworking as rehab since I am much recovered physically, but still have some mental fuzziness when following drawn instructions. Any help would be appreciated! (It has taken me 4 hrs so far to assemble)