You no longer own that domain, so you have no control over it. Any backlinks that you had earned using that domain are still passing PageRank and anchor text to it, and you can't transfer it to your new domain. You basically have to start over, wait for Google to index your new site if it hasn't already done so, and start earning backlinks and PageRank once again. The old domain appears to have no content except blank pages and parking placeholders, so it will eventually be dropped from the search results for those keywords.