C# Interop.Excel, ERROR: "your Data is DELIMITED" Choose File Type

[R2d2Rabeau]

Hi all,

I have an application that manipulates excel files without any problem.
The problem is for a certain folder where files are giving me an error: When I check those files Excel ask me to choose the file that best describes my data as the Text Wizard has determined that my data is delimited....
How can I modify my C# Net 2.0 M (COM Excel 11.0) program to bypass this error?
I am surprised because in my program, "t" has already been coded?????

Microsoft.Office.Interop.Excel.Workbook theWorkbook = ExcelObj.Workbooks.Open("C:/Report.xls", 0, true, 5,"", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t" , false, false, 0, true, false, false);

Any idea how I can still use my program?

Thank you for your suggestions,