Lincssailer

After replacing the passenger side wheel bearing and new drive shaft it quickly demolished the UV joint, it seems the drive shaft is not locking into the diff allowing it to pull out and move about the spines seem ok, I'm sure the old one locks in place

Got a light on the dash and check brake pad warning, replaced all pads front and rear and both sensors both gone but still got the warning and light, is there a reset anywhere i should do?