3D Modeling - corridor reference not working for island curb and gutter.

Hi all, so I created the linear template for back of existing curb after i set its profile active.. then I wanted to create a corridor reference to the EOP so that my existing curb extends to it. When I use the command, I choose first the corridor which is the back of curb that I created, then I click on the EOP reference.. and nothing happens! 
in 3D modeling there is still gap between the curb and the eop.

Any idea?

thanks, appreciate your help!