smps no output

[ravi6545]

I used TNY267 IC in my SMPS without connecting load the output is coming. but when i connect a load it's not working (it comes like ON and OFF). when i check PWM of the IC it shows fluctuating not constant signal. but i change the IC then also the same thing is coming so problem is not with a IC but only thing it doesn't give the correct PWM output. see the circuit attached.

[timenutgoblin]

1N4007 rectifier diode is not suitable for 132kHz SMPS circuit. Try using 1N5819 or 1N5822 Schottky rectifier diode.