Office 2010 Windows 7 64-bit Won't Open Office 2007?

Just bought a new laptop with Windows7 64bit installed-my first exposure to Windows7. I had Office 2007 installed on my old Dell 32 bit machine. I had also recently pruchased Office 2010 and installed that on my new machine.Now, when I try to open those 32bit 2007 files with 64bt 2011, Iget an error message that "no picture file is available", or words to that effect. When I try to "open with", the only option displayed is "Microsoft Office" with an icon that looks like a picture file. When I try to browse to the proper office program(Excel, for example), there are none of teh Office suite programs displayed, only "Microsoft Office".I can navigate seperately to the proper progran, Excel, etc., and drag the file into the application, and it opens, and all seems to work OK. I "save as" the proper application file, but it still will not open with double-click on the file name.