Relay circuit for AC application
Why is R65 in there? Try shorting it out. The relay coil needs 530 mW, which would be 44 mA @ 12 V, and implies that the coil resistance is about 270&Omega;.

A 100&Omega; resistor limits the current to 32 mA, and the voltage to 8.75 V. The latter is less than the pick-up voltage of 9 V specified in the datasheet.