Custom Entity not showing in the related Entities of Advance Find (CRM 2011)

Hello All Experts,

I want to create an advance view in which fields of the both entities will be shown.

I have created N:N relationship between two entities (one is custom entity) but when I go to Advance find view of one the entity the other entity is not present in the related entity column.

can anyone let me know what's wrong in this.

Thanks