i post here yesterday question about tracking moving object . i see a tutorial once of this  issue but i canno't find it now.
can someone tall me were i can fine this tutorial please.
this is very important.

check there:
http://sfx.realviz.com/products/en [...] oduct=mpro

but this tutorial don't help me.this is not what i need

well this is the only place where you can find real viz tutorials.  
If you saw one about tracking a moving object, then i don't know. These are the only tutorials i've ever seen from realviz.