Lei, you don't have to throw it out. Dump all of the jelly back into a pan and bring back to a boil. Add Certo or some type of jelly thickener according to the instructions on the box or package. Sterilize your jars again and rebottle. Your fruit was probably riper than normal and therefore didn't contain enough natural pectin to jell procgiy. I have had this happen to High Bush Cranberry on occasion. Good luck.