Site disappeared from google, But I have no idea why - help!

[Dave-M]

Hi,

My site is only a few weeks old, and one of our articles had been holding the number 1 slot on google for over a week, but yesterday, it disappeared completely from google, under the search terms that it was number 1 with (it is still there with other search terms, although they have to be quite specific).

So, I have had a search for what may have happened, and I have come up with a few possibilities, but I'm not sure how to remedy them, so I could do with some guidance please

Spammy links? I'm not entirely sure what this means exactly, but I havent been posting links everywhere.

Duplicate pages? - The only duplicate things on my forums are some guides that reside in their own specific forum, and then are linked to from a general guides forum. Could this be it?

Hidden text? - I haven't put any there, and no-one else has access, so can we rule that out?

I use the DCSEO linkback plugin, and I was getting hundreds of linkbacks from all over the place, including google.** urls that I never even knew existed.

Some of the linkbacks included some spurious search engines, and I ok'ed them once and then blocked the rest - could this be it?

Also, a lot of people have been linking to my forums from other genuine sites and forums, so could google have interpreted this as spamming?

And one last question. On my google account, it says that my site is included in the index, and I cant see any indication of anything wrong.

Any help would be appreciated

Thanks

Dave.