To solve this problem, there are several things that you can do. You can try to open the Microsoft Excel application and go to Excel option dialog box( If you are using Excel 2007 click the Office button then click Excel Options. If you are using Excel 2010 you need to display the file tab of the ribbon then click Options). Click the Advanced tab on the left side of the window, scroll down to General section and make sure that "Ignore other applications that use Dynamic Data Exchange (DDE)" is selected, then click OK.
Also you can go to the following official web page and download the Fix it for me tool. Be sure to download the version for your operating system.