Here is a question from one of our readers,
How can I sync Google Calendar with Outlook 2010?
Thanks for the question. We are guessing that you were using Google Calendar Sync to keep your Google Calendar perfectly synced with Outlook 2007, but have been bummed to find that the tool is incompatible with Outlook 2010.
Well, worry no more about downgrading Outlook! Google has already updated the Calendar Sync tool to make it compatible with Outlook 2010. So far, support is available only for the 32-bit version of Outlook 2010, but that’s not really a problem as 32-bit software can easily run inside the 64-bit version of Windows 7 (in case you have it).
Download Google Calendar Sync (ver. 0.9.3.6) from here, install it as usual, provide your Google credentials, and choose the type of sync with Outlook. Once setup, it will work silently in the background to keep your Outlook and Google Reader feeds fully synced with one another.
Hope that solves your problem.