How to add column header using xlswrite1?

I have the problem with this code. I have used xlswrite1 to write into Excel file. I want to add column and row header to the data. I have the problem in xlswrite1 which gives the error as

Error using xlswrite1 (line 142)
Error: Object returned error code: 0x800A03EC

Error in xlswrite1 (line 142)
        error('MATLAB:xlswrite:SelectDataRange',lasterr);

%%Multiple variable with label - Writing into excel file - Active X
clc
tic
Excel = actxserver ('Excel.Application'); 
File='testdata.xlsx'; 
if ~exist(File,'file') 
    ExcelWorkbook = Excel.workbooks.Add; 
    ExcelWorkbook.SaveAs(File,1); 
    ExcelWorkbook.Close(false); 
end 

timeVariable=20*rand(1,10)
timeVariable = timeVariable'
tempVariable = 10*rand(1,10)
tempVariable = tempVariable'

a={'Time','Temperature'}
b= [timeVariable tempVariable]

 c.col = a
 c.val = b

 sheet    = 1;
 xlswrite1(filename,c.col,sheet,'A1')
 xlswrite1(filename,c.val,sheet,'A2')

invoke(Excel.ActiveWorkbook,'Save'); 
Excel.Quit 
Excel.delete 
clear Excel
toc

[Ganesh K Davanagege]

Row and Colum labels using xlswrite

Issue resolved. Thank you.