Laurie, Launderess has given you good advice, I would recommend you research how to start the cleaning process on your FL, if you've been using soap for a long time it needs cleaned, I can't help you with that I'm a water hog user.
I can recommend detergent, if your looking to save $$ try the sears powdered detergent, either the orange or green box are very good, and spiked with STPP is excellent. Sears often has them on sale, I just bought a 275 load box for 19.99, and its HE.Tide is the best the US offers, its generally on sale somewhere and coupons are easy to come by.I would also advise you to stear clear of liquid detergent at least for now, I'msure your machines gunked up enough right now. Good luck Cheryl