Problem sending the command to the program.

Problem sending the command to the program.When double clicking an Excel file, the above message is received. File only opens when opening Excel, then going through 'Open' and physically finding the file.

Step I:

Follow the steps and check if that helps: 

1.Go to the location C:\Program File\Microsoft Office\Office 12\excel.exe
(if you are using a 64bit machine, then you would have to go to C:\Program files x86\Microsoft Office\Office 12\Excel.exe)
2. Right click on Excel.exe and click on Properties and then click on Compatibility tab. Check if you have any check mark in any of the compatibility mode options. Make sure you also click on the option "change settings for all users" tab at the bottom of the same screen and look for similar check boxes in the window.
3. Uncheck the option Run as Administrator option is you have it checked.
4. If you see any check boxes in the compatibility mode options, uncheck all the boxes and click on Apply and OK.
5. Try to open Excel now and check 

Step II:

Open Excel,
1. Click on the Office Button which Is at the left hand top corner
2. Click on Excel options.
3. Click on Advanced
4. At the right hand side scroll down till you get the general tab.
5. Uncheck ignore other applications that use Dynamic Data Exchange (DDE)(If it's checked)
6.Click ok and exit Excel
7. Now try opening the Excel files by double clicking on it.