Can Method in VBA Code from ActiveX control causes "macro may not be available" exception

I have an Active X control that calls an Excel Template and attempts to run a method called "RunReport".

I have tried:
1) Checked to make sure that the path I am using is correct and that the file name is correct
2) I have made sure that the file name, module and methods do not have any underscores
3) Enabling all macros and "Trust access to VBA Project model" in the Trust section.
4) I have attempted to prefix the method name with its module name "Module1.RunReport" and tried "MyExcelTemplate.xltm!Module1.RunReport"
5) I have tried Removing and re-adding the Method (Saving and trying the file after each step).

Any help you can provide would be great.

Code Snippet:
Dim officeApp As Object = Nothing
Dim templateDocument As Object = Nothing

officeApp = CreateObject("Excel.Application")
officeApp.Visible = False

templateDocument = officeApp.Workbooks.Add(Template:=ReportParameters.ProcessTemplate)

extendedMethodName = "Module1.RunReport"

officeApp.Run(extendedMethodName, ReportParameters)

templateDocument.Close(SaveChanges:=False)

officeApp.Quit()

This is VB.NET. ReportParameters is a class of properties (strings and booleans mostly). I have verified that ReportParameters exists and has valid values as well.

Agreed. RunReport expects one parameter as an object which is the ReportParameters class -- The ReportParameters class is just some strings and booleans.

Norie,

Here is the signature for the RunReport Method:

Public Sub RunReport(ByRef ReportParameters As Object)

-JosephP,

The Workbook does not have a reference to the .NET library that is calling it that is passing the ReportParameters. However this does not seem to be a problem. Some of the reports seem to work just fine - no errors.

From what I am reading in my continued research, there is some suggestion that the excel files might be corrupt or there might be an issue with the references used? I am looking into that now to see if that might be what is causing it.

Any other ideas?