Make sure you have the correct version (64 bit if you have 64 bit Poser installed) When you run installer just change ...../poser2012 to .... /Poser11. If you have done this then make sure you have added libraries with DAZ content in them to Poser 11. This could be problem if you have content in "downloads" library as downloads library in poser 11 will be different folder to downloads library in poser 2012