I'm having a problem with the checkpoint system in Advent Rising. In chapter 4, where you face off against one of the Seekers (where you first get your Push power), the game keeps starting me back at this scene. I've gone more than an hour past it and if I exit the game, I wind up back at that same scene, despite the game indicating multiple times that it is saving a checkpoint. I've been all the way to the drowned ship, exited, and had to start over from where you first get Push.

Anyone else having this issue? Is there anything I can do to fix it?

I am playing on an AMD FX 9370 system with 16GB ram and a Radeon HD 7950 video card in Windows 8.1

Update
I went into the game desktop shortcut properties and marked it to be compatible with windows xp and administrator and it seems to be working just fine now.