Won't jump, help.

make sure you have a good connection on the battery (battery cables, and the jumper cables)
you might have a corroded connection at the starter
try having someone attempt to turn the car over while you hit the starter with a hammer (i know it sounds scary but it works if your starter is going)

+1 on the clean the connector and make sure that they are tight.

i had the same problem with mine, it wouldn't take a charge. i had to put it on a trickle charger for about a day, been fine ever since.

i disconnected and re-connected the battery, and then it took a jump, for some reason the running lights were left on with the switch off though, any reason why this happened?