Hen Auto Installer Problems PS3 4.86

Hey,
i got some serious problems with my PS3. Upgraded it on 4.86 HFW and visited the Page ps3xploit.com
After i close the browser, open the Remote Play and i quit i get an Symbol to install Hen.
It loads but gets stuck at 99 %. After that i can only quit the Download. What i am doing wrong?