Where's my classified ad gone?

Can anyone tell me why my ad might have dissappeared tonight from the road for sale section. I added a post to it in reply to enquiries, no prob with that. it went on fine. I've just come back on to check for more enquiries and it's gone. Any ideas?
BTW my other ad i have is still there.

Thought I'd ask on here before I contact the admin folk in case it's a common thing.
Cheers, Pete