Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2700214&page=1#message_2998380

Sounds to me like you downloaded a muscle character from another site and not the muscle morphs package.  The only place you can get the morph packages is from Daz..

if you want to change the look of her face and body, or use any of the available character addon packages, you need to buy the head and body morphs.

The V3 head and body morphs are here:

http://www.daz3d.com/shop.php?op=itemdetails&item=3008

Also, Michael 3, is available free right now too at Daz3D. Again, like Vicky, you need the head and body morphs to change the shape of his head and body. Those can be found here:

http://www.daz3d.com/shop.php?op=itemdetails&item=3009

If you have both figures, you can get both of their head and body morphs in one package, here:

http://www.daz3d.com/shop.php?op=itemdetails&item=3010

NOTE:  You can use the textures from the character addon packages without having the head/body morphs. 

If you want to change the look of the head/body and have the head/body morphs, do the following:

Install the head and body morphs. 

Locate the morphs you want to use in the "Poses" folder.

Find the set of morphs you want to inject IE:  Full Body, Full Head.... or just certain parts. 

Left  click the picture

Click the Single Checkmark at the bottom of the page.

Go to your Parameter Dials and start turning dials.  (make sure that you have the part of the body you want to adjust as the active one IE:  Morphing the ears, make sure you have the had selected.

Also, you may want to have a look at the post in the above link. It's a collection of information of new users. I know that you said you had used poser years ago, but you've been away from it for some time, so you might want to look at it anyway :)

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi