oblivion glitch w/ main quest (360)

[BlueSky]

i have fought my way through the series of towers in the first oblivion gate and have reached the sigil stone, but when i activate it, it does not teleport me out. i have looked at all sorts of online walkthroughs and they all say that i should be teleported outside instantly. am i mistaken or is my game glitching (rather than teleport me back to Kvatch i remain at the top of the tower inside the oblivion gate, and it doesn't update the Breaking the Siege quest info.) Anybody w/ any ideas, because I am stumped

[Belthan]

Definitely a glitch. As you say, when you activate the stone you should be teleported out of Oblivion. Hate to say it, but the only thing I can think of is reloading a save game. If you didn't save anyplace in the tower, you should have an autosave from when you entered Oblivion.