oracle error in windows-7 64bit

I installed windows-7 64 bit. When I try to run my program (that works with Oracle 11g) I get this error:

Attempt to load Oracle client librari开发者_开发百科es threw BadImageFormatException 
this problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed

What can be the problem ? Where I can download 64 bit oracle client ?

(can I get any link for download)

thanks in advance

Have you tried download the 64bit Oracle Client from:

http://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-win64soft-094461.htmlBlockquote

This looks like it might be the correct download:

Oracle Database 11g Release 2 Client (11.2.0.1.0) for Microsoft Windows (x64)
win64_11gR2_client.zip (615,698,264 bytes) (cksum - 2947608743)
Contains the Oracle Client Libraries. Download if you want the client libraries only

Alternatively, if you cannot obtain a 64 bit version of the Oracle client and are stuck with the 32 bit version, then you can either:

1. rebuild your .NET application to only run as a 32 bit (x86) process instead of "Any CPU" or
2. use CorFlags.exe (CorFlags Conversion Tool) to reconfigure your existing .NET application exe to run as 32 bit without having to rebuild it.