Realization of series capacitance

Can any one tell me why i m not able to realize a series capacitance using simple slot yet it provides the series capacitance to complete the circuit of CRLH on SIW.

A slot in the direction of propagation will present a series capacitance. If you find this doesn't work, you either created the slot improperly or are not measuring properly.

That means transverse slot cannot be used for Realizing series capacitance

Sorry, I was rather ambiguous. I mean if there is a gap in the conductor in the direction of propagation -- i.e., a slot in the transverse direction, yes.