How to run DLL in IIS version 6.1

An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

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.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

Source Error: 


Line 22:         protected void Button1_Click(object sender, EventArgs e)
Line 23:         {
Line 24:             itd = new tdg.tdgITurboDIAG();
Line 25:             Response.Write(itd.ToString());
Line 26:             PI = itd.Initialize();

Source File: c:\Users\m.yarian\Desktop\WebApplication1\WebApplication1\WebApplication1\WebForm1.aspx.cs    Line: 24 

Stack Trace: 


[BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)]
   MathWorks.MATLAB.NET.Arrays.MWArray.mclmcrInitialize2(Int32 primaryMode) +0
   MathWorks.MATLAB.NET.Arrays.MWArray..cctor() +375

[TypeInitializationException: The type initializer for 'MathWorks.MATLAB.NET.Arrays.MWArray' threw an exception.]
   MathWorks.MATLAB.NET.Utility.MWMCR..cctor() +1294

[TypeInitializationException: The type initializer for 'MathWorks.MATLAB.NET.Utility.MWMCR' threw an exception.]
   tdgNative.tdg..cctor() +46

[TypeInitializationException: The type initializer for 'tdgNative.tdg' threw an exception.]
   tdgNative.tdg..ctor() +0
   WebApplication1.WebForm1.Button1_Click(Object sender, EventArgs e) in c:\Users\m.yarian\Desktop\WebApplication1\WebApplication1\WebApplication1\WebForm1.aspx.cs:24
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +155
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3804