Q:Hello,I've just downloaded and installed Office 2010 x64 on my Windows 7 x64. The Windows Mobile Device Center (WMDC) cannot detect Outlook, I've got this message : Either there is no default mail client or the current mail client cannot fullfill the messaging request. Please run Microsoft Office Outlook and set is as the default mail client.Well, it's too bad that we cannot Sync Windows Phones !Problem is due to the 64-bit Platform, the MAPI x64 and the pseudo x64 WMDC.In fact the error message is generated by InstallForm.exe (c:\windows\windowsmobile) and this application is a 32 bit application !!So InstallForm use the MAPI32.dll and Call the GetOutlookVersion function in 32 bit mode instead using the 64 bit mode. Why we have 32bit applications for the x64 version of WMDC ? The MAPI Reference for OUtlook 2010 give the root cause of the issue :32-bit MAPI Application and 64-Bit Outlook32-bit MAPI applications are not supported to run on a computer installed with 64-bit Outlook and 64-bit Windows. The application developer must update and rebuild the application as a 64-bit application for the 64-bit platform. This is because a 32-bit application cannot load a 64-bit Msmapi32.dll file. There are a small number of API changes that application developers must incorporate to build their code successfully for a 64-bit environment. MAPI header files have been updated with these changes to support the 64-bit platform. You can download these header files at Outlook 2010: MAPI Header Files. Developers can use this same set of MAPI header files to build both 32-bit and 64-bit MAPI applications.So solution is quite simple :MSFT developpers guys have to develop a true x64 version of WMDC , but when ?Workarround : Install Outlook 32bit.A:Yes. You must uninstall the 64-bit Office 2010 Beta and install the 32-bit Office 2010 beta. You still need the 64-bit version of Windows Mobile Device Center for your 64-bit OS (go figure!). The nice thing is that all the Outlook settings are remembered. I didn't have to set up any accounts again. (and, yes, you cannot just install the 32-bit version of Outlook 2010 beta. If you try, an error message says 32-bit Outlook 2010 requires other Office apps to also be 32-bit)This is not the only thing that's pretty broken with Office 2010 beta. I tried to install the 32-bit Outlook Business Contact Manager, a very nice upgrade indeed from the 2007 version. But when I try to run it, I get "A Dialog Box is open. Close it and try again." Cannot find any open dialog box and product won't work at all to create new projects, tasks, or accounts!Welcome to My Store www.office2010forsale,Buy microsoft office 2010、microsoft office 2007、microsoft access 2010 and microsoft office professional plus 2010 product key..100% genuine Microsoft office software product key.