You are not saying how you are doing the install nor which version you are using so the best advice I got is to watch this: http://vimeo.com/39743315
It shows how to download right version of eclipse and use eclipse marketplace to perform installation.
Thanks for the answer Max, i just solved it here. I was having a problem with eclipse and proxy, that's why i was not doing by the remote web, but i solved the problem and it self installed all OK.
When i was trying to install it manually, I had download the latest jboss version: jbosstools-3.2.2.Final.aggregate-Update-2011-11-14_23-06-23-H1430.zip
It gave me a good headache
Anyway, thanks for the attention Max