Hello all, I'll be 20 miles out inbound and I have LNAV and VNAV selected, then when I go to select LOC and when the LOC needle starts moving towards the center, everything starts going downhill. On the PFD is says single command and the airplanes starts turning the wrong way. I have the ILS programed into the FMC and both ILS freq tuned in, but even when I go to APP mode it says single command and doesn't want to capture the needle, it just starts a bank away from the LOC. So I take over and hand fly it and when I hand fly it, the glide slope needle will never appear on the whole approach. Any suggestions? Thanks Tim B