Open site explorer linking root domains

[isret_efront]

My company has been trying to increase the number of linking root domains for a specific page on our website using our PR company and press releases that are sent out and linked back to this page. This is working nicely, but the number of linking root domains is still not increasing under the "linking root domains" tab. I am noticing the correct links to this domain under "fresh web mentions" though. I know this tool can take a bit to update, but it has been quite some time and I still only see the one link.