Sharepoint webservice to connect with oracle

Question

I want to create a sharepoint 2010 webservice with 3.5 framework which allows to connect with oracle and perform the basic database operations. i had used 2 methods to connect with oracle both went in vain. first i used oracle.dataaccess dll to connect with oracle. but it threw badimageformat exception due to the framework of the dependency dlls. After that system.data.oracleclient, since sharepoint apppool is 64 bit it threw an exception as"Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed." Is there any way to connect oracle with sharepoint webservice??? Please help!!!!!