Well Ghost, unfortunately you have came up to a part of the game that is majorly glitched, but don't worry you are not alone. Supposedly this glitch is very common and requires a little bit of cheating. Ok, since u cannot enter the door to get back to the graveyard (it sucks you in when you try to open it) you have to go back to the area where you found Kain's Family Crest (the crypt room). Do this by simply jumping up onto the stone pillars in the middle of the garden area and then jump onto the movable stone pillar. From here jump onto the ledge leading into the room which required you to shift into spectral form to jump from pillar to pillar. From here, now that you are in this room shift into spectral form. Now go the place where (the buried corpse) you can shift back into material form and begin to do so but while Raziel is underground during the transition from spectral to material, pause the game and enter Up, Down, Up, Down, R, black, Down, B, Y. Now Raziel will be in "Cartoon Mode". Now shift back into spectral form and begin the transition from spectral to material yet once more. Again stop mid-way through while Raziel is underground and repeat the password above. Now when Raziel comes up from the ground, the game will be fooled into thinking that Raziel is in the material realm while his is actually in the spectral realm. From here you can pass through the bars located in this room and simply backtrack to the graveyard. Once through the bars, save your game and reboot your xbox. Raziel will now be in material form. If you have any other questions feel free to ask me. Thanks
