Thanks Guitta for your infos, also if this is not what i hope to listen... So now i'm trying to make all project in Vue (with the speed problem). I've my old Vue 4 installation with Mover 4 working... I've installed my new Vue 4 Pro with Mover4 for vuepro (add-on folder), but it doesn't work... Bad serial error and after this star Vue 4 pro but without Mover4. Can u give me some help? (I've a big problem, because my short film project must be ready for the end of November and i need to start the rendring) Thanks xman