The solution was simple but tricky! It toke one week to find it!!nI have selected the mixture template for all phases in species model. At this time fluent shows just ONE mixture template in material panel. So to create the seconded one I did right click on mixture template and select copy. Then new mixture template created and can be modified. nAlways I was looking for NEW command to create mixture like what we do to create/add new material. Maybe ANSYS would change it this way sometime.