You need the Adobe flash player for Microsoft's Internet Explorer NOT Google Chrome!

To quote from Poser Pro's Read Me (!!!):

" Poser’s Content Library utilizes Microsoft Internet Explorer technology.(...)

Poser's embedded Content Library palette depends on a matching Flash Player installation. If you're experiencing difficulties and are unsure whether the right version of Flash Player is installed, check if the Content Library palette prompts you to 'Get Flash'. If yes, follow the installation process. If no, please make sure to obtain the latest Internet Explorer version from http://get.adobe.com/flashplayer/  (without tool bars or security scans; Windows only). "