Not installed yet.
A couple of things could be doing this - can you dismiss the splash screen by pressing the "Esc" (maybe a few times) after it appears to try to see if you can see whats going on ?
If you get to / have intalled and you get a similar problem.......
Another possibility is it has created a dodgy partition. Search about on this site for simialr probs - there has been issues with the partition creator/mbr/etc and Kris is working hard to reslove this. (as you could imagine).
I ended up deleting my partition with the UBCD 3.3 tools, creating a new Freebsd partition with UBCD 3.3, installing GAG bootloader, and telling PC_BSD NOT to install a bootloader. It was a stuff around but worth it. I know the partition issues are being focused on.