Hi Sobana,
I’ve mentioned this to other users here, but I see that you are using the OS 12 OFDM components, which we kept in OptiSystem 13 for our users. The new OFDM components are highly recommended as they make using them much easier.
As a side note, if you click the OS 12 OFDM Demodulator and then press CTRL+F the component will be oriented in the right direction.
Regards