I can't see STL file made by meshmixer

As you can see on the title above, i use meshmixer for working on different stl file and sort out modelling errors…But, When i finish my work and i do “make a solid”, “combine file” and export the new combined file…i can export and create a new stl file, but, when i charge this file on CURA (slicer software) i don t see the object, i just see the shadow on the plate, but not entire object, but when i select preview i can see the single layer…somebody can help me to get…what is the problem.
Thanks in advance.