我想在我的web应用程序中使用oledb连接（msdaora.dll）连接到oracle。
我用途：

IIS 7.5
64 bit windows server 2008 r2 enterprise.
64 bit oracle 11g
32 bit oracle client

visual studio 2010
32bit msdaora.dll
my aplication is .aspx

我的错误是什么

Server Error in '/PPIGanTT' Application.
--------------------------------------------------------------------------------

Oracle client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3.3 or later client software installation.

Provider is unable to function until these components are installed. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.OleDb.OleDbException: Oracle client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3.3 or later client software installation.

Provider is unable to function until these components are installed.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 

[OleDbException (0x80004005): Oracle client and networking components were not found. These components are supplied by Oracle Corporation and are part of the Oracle Version 7.3.3 or later client software installation.

Provider is unable to function until these components are installed.]
   System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) +351
   System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) +86
   System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) +31
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +76
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +126
   System.Data.OleDb.OleDbConnection.Open() +43
   csOra.OpenCnn() +47
   csOra..ctor(String sTnsName, String sUserId, String sPassword) +273
   _Default.Page_Load(Object sender, EventArgs e) +8801
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

我以前尝试过：
1--在iis中，我将enable32applications更改为true。
2--将我的连接类型从oledb更改为oracle.data.access，但它也不起作用。
3--我想找到64位msdaora.dll，但找不到。
我可以做些什么来修复这个错误？谢谢。