Failed to find or load the registered .Net Framework Data Provider in Oracle for asp.net application

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ASP.NET

ODP.NET

Hi,

string constr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=spp01)(PORT=1521))(CONNECT_DATA=(SID=Global)));User Id=SYSMAN;Password=testman3";
string ProviderName = "Oracle.DataAccess.Client";

DbProviderFactory factory = DbProviderFactories.GetFactory(ProviderName);

I have asp.net application to show gridview.For a gridview datasource, I am using data from oracle database,but I could not connect with oracle database. I am able to connect to oracle in console and winforms application,but not in asp.net. I have installed 64bit ODAC. The ORACLE.DATAACCESS version is 2.112.3.0. I have checked machine.config entries in Framework64 v2.0.50727 and v4.0.30319

the machine.config contains following

add name="Oracle Data Provider for .NET" invariant="Oracle.DataAccess.Client" description="Oracle Data Provider for .NET" type="Oracle.DataAccess.Client.OracleClientFactory, Oracle.DataAccess, Version=2.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342"/
CPU = x64 Framework=3.5

When I run ASP.net application, I get the following error

System.ArgumentException was unhandled by user code
Message=Failed to find or load the registered .Net Framework Data Provider.
Source=System.Data
StackTrace:
at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)

I have even set the apppool to allow 32-bit applications.

How do I resolve this error?