You may see that the LED comes on and goes off 'slowly', thats because there is no 'positive' feedback from the output to the '+' [non inverting input of the 741].
The way you had it connected was that nearly all the output signal was being fed back to the inputs.
You say you have only got 10K maximum value resistors.!!
What we need now is a 1M0 resistor from pin7 to pin 3, this will make the circuit switch quickly On/Off.