无法加载文件或程序集的Oracle。DataAccess ODP.NET的64位

I am using ODP.NET in my asp.net project in order for the application to talk to oracle 11 g Express on Windows 2008 server (32 bit). While on development machine I had Windows 7 (32 bit). I installed Windows 8 (64 bit) on the development machine and tried to run the application from visual studio 2012, It gave the error 'Could not load file or assembly 'Oracle.DataAccess''. After a little search I realized that I have to install in my asp.net project in ord