Error using xlswrite1

When using xlswrite1, I havae been having some issues with it correctly writing data to the spread sheet; it doesnt upload at all. When uploading this:

%comment
Excel = actxserver ('Excel.Application'); 
File='C:\YourFileFolder\FileName'; 
if ~exist(File,'file') 
  ExcelWorkbook = Excel.workbooks.Add; 
  ExcelWorkbook.SaveAs(File,1); 
  ExcelWorkbook.Close(false); 
end 
invoke(Excel.Workbooks,'Open',File);

I get this: Error using Interface.Microsoft_Excel_11.0_Object_Library._Workbook/SaveAs.

I cannot use xlswrite due to the amount of things I have, but xlswrite1 isnt working. How can I fix xlswrite1 so it not only doesnt give me this error, but it allows for the data to be transferred to the excel document. This is adding onto my last question which can be viewed here: http://www.mathworks.com/matlabcentral/answers/266354-how-can-i-use-xlswrite-in-a-nested-forloop-without-overwriting

[Walter Roberson]

Is an extension included in the file name? Is the destination writable?

[Daniel Allkenmach]

I just did that. BUt now each time I try to open the excel file, it says it it locked. Why is that?