Batman: Arkham Asylum - Stuck in the Batcave

Help! I'm playing this game on the PC and I'm stuck on the part where I have to exit the Batcave after getting the Batclaw.
I open the vent, but after that there's nothing else, I can't even grapple.
Can someone help?

hello I've been playing the game also and i am a bit futher then you arewhen you get the batclaw get in detective mode (X) and look for a wall which
you can break (it is in the batcave when you at at the platform you'll
see a wall which you normally can spry with your explosive gell) butt the platforms does not get that far so you have use your batclaw to pull the wall down with the batclaw and then use your line to get there and exit the cave then you'll be outside againuse this following link and you'll see the ps3 walkthrough with screenshots and then you will understand wat i was saying above herehttp://guides.ign.com/guides/14273490/page_60.htmlfrom there you can use the walkthrough to go on

Wait a minute, I'm supposed to get out of the batcave trough the vent.
There's a vent in there that I have to open using the Batclaw, after that I have to grapple to that vent but there's no grapple sign in that vent and basically I can't get out of the Batcave.

[quote="g@l1h"]Wait a minute, I'm supposed to get out of the batcave trough the vent.
There's a vent-----> = a wall you must pull down with the batclaw , after that I have to glide to the open space you've just uncovered and grapple upwhen the grapple don't workthere is a trainer which alows you to go up and down with hotkeys you can use
i had to use then also to get out of the caveyes you can follow this link and look at the last 4 pictures of the page then you will see
why you can't get out

Hmm I see, this is some kind of glitch huh?
I'm restarting my game from the beginning and now it works. I just hope this doesn't happen again.
Thanks Fire_Ice ;D