Either that or your battery has died. The old battery could be pulling the jump battery down not leaving you enough start. Your engine needs to spin over rather than just turn over.
Edit: after posting I see that NIW is thinking along the same line.
Another edit: Tuesday my truck battery died as in immediately died. I cranked and drove it, then 5 minutes later it would not even click. Dead.
A battery load tester (carbon pile 100 amp.) is cheap.
Schumacher (on Amazon) is $42.20.
Some are cheaper still!
I have a 500 amp battery load tester.
500 amp load tester on Amazon = $77.98
Every tractor owner should have at least a 100 amp battery load tester.
Works for cars, trucks, mowers, boats, tractors, etc.
Testing is also done free, at most auto parts stores.