my boxes won't flip to give the inverted view. instead they just turn black. i've followed the instructions in the formal tutorial and in the video tutorials available for download. the only thing that i can see thats out of place is when i right click the box to convert to editable mesh that particular text is highlighted blue. at any rate this is havoc with the later steps...

thanks if you can help

rightclik the object and go "object properties"
turn on or off ( i dont remember) "backface cull"