You may have better luck searching once you know what the error is in english:
"The specified store provider cannot be found in the configuration, or is not valid"
Also, "Unable to find the requested .Net Framework Data Provider. It may not be installed."
Make sure you installed properly. If your application target is 32-bit, make sure that the configure.bat that was run was for 32 bit.. if it was 64 bit make sure to run the configure.bat for 64-bit. Please understand that Oracle.DataAccess.Client is unmanaged, meaning that the "bitness" matters.