microsoft acess 2007

We can't begin to tell you what to do if we don't know what it is you're seeing when you try to open the file.

What error do you get?

What operating system is Access 2007 installed on?

Where is the file located? Your computer or a network share or a public folder on a domain?

Go here for more info:
http://technet.microsoft.com/en-us/library/cc178973.aspx

Please post back if you have any more problems or questions.
If this information is useful, please mark as helpful. Thanks.