Try removing the cap on pin 5, leaving pin 5 open. It is optional anyhow. Voltages. Assuming the battery is 9V (bad assumtion, 9V batteries are pretty unstable over the long term, but the 555 is designed not to care), pin 5 is 1/3 Vcc, or 3V. Pins 2 and 6 (same point) are between 1/3 and 2/3 Vcc, and should be shifting, and Pin 7 is higher than pin 6, until it conducts (1/2 of the cycle) and it goes to ground. It is possible that pin 7, which is a switch, is blown, a common problem.
This article, CMOS 555 Long Duration Minimum Parts LED Flasher, shows how this oscillator works. Other than not having a LED resistor (which is a specific property of the CMOS 555 and low battery voltage) it is very similar to your circuit.
This article, CMOS 555 Long Duration Minimum Parts LED Flasher, shows how this oscillator works. Other than not having a LED resistor (which is a specific property of the CMOS 555 and low battery voltage) it is very similar to your circuit.