Forum appearing in google search with old domain

Hello

After we've changed domain of our forum to: http://www.nfssecrets.tk/ , it still shows up on google search with the domain http://nfssecrets.forumotion.com/. I went to google to do recrawling and all of that and it still doesn't update the domain. Also shouldn't that old domain of yours be like removed or what? How would I go about "fixing" this?

It takes time for search engines to replace old links with new ones.  You need to share content from your forum on Twitter, Facebook, Google+, and other social media networks.  Also if you posted on other sites the old link, it will appear in search engines.

Yeah, I thought that was it. Well then I can only wait for it to get updated.
Thanks for the info