Single interface while 2 different zones are provided
 

Hey there
I have created a 2D mesh by ICEM and have provided different fluid zones (surfaces with different names). the boundaries between these different fluid zones (curve) has been names as INTERFACE. the meshing progress is done well but after importing to the Fluent there is just a single interface while the different cell zones are recognized, I am not able to do the mesh interfaces progress and create any interface cause there is just a single interface and Fluent returns the "Zone interface selected in both left and right interface lists" error.
Any help is welcome.