We weren't able to connect you to the Windows Store

I know this has been asked at least 100 Times, but still, I can't connect to the Windows Store on my new Surface RT running Windows 8.1 Preview. I tried:

• disable proxy

• correct date and time

• wsreset.exe

• reinsetting the PC (but I got the Surface as developer device one day ago and the problem existed since I booted up the first time)

• Installing all the Updates (but it always says it wasn't able to complete the configuration of the PC and ins restoring the PC)

• signing in with a local account instand of a MS account

But it all didn't work.

If it helps anybody, here is the winstore log file:

 2014-01-18 10:13:03.791, _Info_                WS   [00001044:00002416] CNetworkState: Connected = true, Overage = false, MaxDownloadSize = -1
 2014-01-18 10:13:03.806, _Info_                WS   [00001044:00002416] CUpdateCountPublisher::Initialize: Registered CUpdateCountPublisher
 2014-01-18 10:13:03.806, _Info_                WS   [00001044:00002416] CInstallProgressManager::RefreshUpdatesInstallState: Updates are NOT in Progress
 2014-01-18 10:13:03.900, _Info_                WS   [00001044:00002416] visibilityState changed to: visible
 2014-01-18 10:13:03.900, _Info_                WS   [00001044:00002416] CWinStore::_ClearErrorPage: Navigating home
 2014-01-18 10:13:03.900, _Info_                WS   [00001044:00002416] navigateUI: Navigating 'WS' iframe to  https://wscont.apps.microsoft.com/winstore/A43F8337-2B31-4735-A006-9328167C3098/6.3/754/WW/de-de/0/31/Home.htm
 2014-01-18 10:13:03.916, _Info_                WS   [00001044:00002416] navigateAjax: Loading file:  https://wscont.apps.[I had to remove parts of the link because I hadn't enough Reputation to do this].com/winstore/A43F8337-2B31-4735-A006-9328167C3098/6.3/754/WW/de-de/0/31/Home.htm
 2014-01-18 10:13:03.947, _Info_                WS   [00001044:00002416] navigateAjax: Response received; href =  https://wscont.apps.[I had to remove parts of the link because I hadn't enough Reputation to do this].com/winstore/A43F8337-2B31-4735-A006-9328167C3098/6.3/754/WW/de-de/0/31/Home.htm
 2014-01-18 10:13:03.963, _Info_                WS   [00001044:00002416] WinStore.Navigation received a resume event.
 2014-01-18 10:13:04.010, _Info_                WS   [00001044:00002416] Frame.onResize: CurrentOrientation: landscape
 2014-01-18 10:13:04.025, _Info_                WS   [00001044:00002416] SQR::GetHomePageData: Querying cache.
 2014-01-18 10:13:04.025, _Info_                WS   [00001044:00002416] om.showPicksForYou: queueing overlapped callback
 2014-01-18 10:13:04.072, _Info_                WS   [00001044:00000336] WinStoreCache::DoQuery:  Provider 2 returned 2034 bytes (0x08a409b0) for GetInstalledAppList
 2014-01-18 10:13:04.572, _Error_               WS   [00001044:00001244] DownloadUrl failed - 400 for  [I had to remove parts of the link because I hadn't enough Reputation to do this]browse/6.3.9431-0/754/de-DE_de-DE.de/c/DE/cp/10005001/HomePageData/pt/arm/lf/1/os//
 2014-01-18 10:13:04.572, _Warning_             WS   [00001044:00001244] WinStoreCache::DoQuery: Provider 0 returned failure for HomePageData, hr=0x80190190
 2014-01-18 10:13:04.572, _Error_               WS   [00001044:00002416] CHomePageData::OnEvent: hrEvent=0x80190190, navigating to error page.
 2014-01-18 10:13:04.572, _Error_               WS   [00001044:00002416] CWinStore::_NavigateToErrorPage: Wir konnten keine Verbindung mit dem Store herstellen. Möglicherweise ist ein Serverproblem oder eine Zeitüberschreitung der Netzwerkverbindung aufgetreten. Warten Sie bitte einige Minuten, und <a id='linkRefresh'>versuchen Sie es noch mal</a>.
 2014-01-18 10:13:04.603, _Warning_             WS   [00001044:00002416] onAjaxPageLoaded: Navigating to new page while a page navigation is already in progress
 2014-01-18 10:13:04.603, _Info_                WS   [00001044:00002416] om.invalidateCallbacks: invalidating callbacks
 2014-01-18 10:13:04.666, _Info_                WS   [00001044:00001244] WinStoreCache::DoQuery:  Provider 2 returned 2034 bytes (0x08a409b0) for GetInstalledAppList
 2014-01-18 10:13:07.428, _Info_                WS   [00001044:00002416] visibilityState changed to: Hilden

I hope Theres is a Solution for this Problem