Scissorman

Hello everyone, I've recently been finishing up my original Xbox collection and only two games I own will not boot up when I put them into my original Xbox. The Xbox is old, and I have been having some problems with the disc tray that I've been able to work around, but every game I own boots up with zero issues besides those two, which are Batman: Dark Tomorrow and Dino Crisis 3. The discs themselves are in near perfect condition, and even when I use the discs in my computer, it recognizes that they are Xbox games and plays the video saying to insert it in an Xbox system. Are there issues with these two games that I don't know about or would it be the Xbox itself having issues reading these games properly? I'm especially upset about Dino Crisis 3 because it took me a while to find a decently priced copy of it. Any advice or help is appreciated. Thank you!