[Q] Online Windows Phone Marketplace (windowsphone.com) not working?

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http://forum.xda-developers.com – Hello, Today I noticed that I can't install apps from online marketplace (at windowsphone.com), and all other functions on the site are disabled too, like no phone is registered on my Live account. I am using beta 7.8 ROM for Omnia 7 that has been around for some time, if it makes any significance. I get the following message: "You need to sign in with a Microsoft account on your phone before you can get apps from Windows Phone Store." Of course, I am logged in with the same Live account that I am using on my phone, as always. Marketplace app on the phone itself is work (HowTos)