ODP.NET

hi
i get this error when i run a page on the server

Server Error in '/AspNetTest' Application.
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The provider is not compatible with the version of Oracle client
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: Oracle.DataAccess.Client.OracleException: The provider is not compatible with the version of Oracle client

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:


[OracleException (0x80004005): The provider is not compatible with the version of Oracle client]
Oracle.DataAccess.Client.OracleInit.Initialize() +351
Oracle.DataAccess.Client.OracleConnection..cctor() +446

[TypeInitializationException: The type initializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception.]
Default.PageLoad(Object sender, EventArgs e) +415
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061


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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42


can someone help me understand...whats wrong and what step do i need to take to get this page running,.
thanks samir