K.T.
My daughter did the same until we added sweet potato baby food. It worked like a charm. A bit sweet, but maybe not as much as the apple sauce. Did the same for my son, but he's been a much less picky child. Also, don't withdraw the spoon too soon at the beginning. They have the tongue thrust reflex until they get used to it. If you leave the spoon in place for a few extra seconds, it allows them to suck the food off, which they do naturally. Also, make sure what your feeding is soupy or the reflex is stronger. Good luck.
K.