Help With Mpeg On Vegas Video 3?

[5.7]

I couldnt render as MPEG files after I entered in the serial? It then told me to register over the phone/internet. So I uninstalled it so now I have it on demo so I can enter in a new serial but this time I need to get a serial for the MPEG.
I think theres a damn mpeg keygen but not sure?
Thanks

edit I just D/L Sonic Foundry MainConcept MPEG 1.2 Plugin v1.0 Keygen
and entered in my ID to generate a serial but when I enter in that serial it doesnt work?

[5.7]

ttt