Using a step by step relay along with a solid state relay
According to Farnell your relay has a coil resistance of 6.5 k&Omega;. That means that the maximum current it will draw is about 33 mA on 230 V AC.



Figure 1. The SSR output rating shows that it has a minimum load current of 0.10 A.

Since 33 mA &lt; 0.10 A the SSR can not turn on reliably so the relay does not energise.

For further reading on SSRs and how the zero-cross detection works see what I've written here.