WKO+ v2.2 does not recoginze Com Ports greater than 16.  If Windows automatically assigns a Com Port number highger than 16 to a device during the installation of the device drivers, it will be necessary to manually change the Com Port number to a value lower than 16.  To do this, follow the steps for which version of Windows you are using.

Vista 

  Click here for a screenshot image dispalying these steps : 

1. Open Windows Device Manager, contained in the Hardware and Sound section of the Windows Vista Control Panel
2. In Device Manager, Open the Ports section
3. Plug in your device download cable/cradle to your computer
4. Double click on the Usb to Serial Comm Port that appears after plugging in the device download cable/cradle to your computer
5. Click the Advanced button in the winodw that appears
6. Open the COM Port Number menu and make sure a vlaue of 16 or lower is selected.  If a value greater than 16 is selected, change it to an available number less than 16, then click OK

7. Once you change the com port Windows has assigned to the cradle to a number less than 16, you should be able to follow the normal download steps successfully:
   http://support.trainingpeaks.com/trainingpeaks-wko/managing-your-data/device-download.aspx

XP

 Click here for a screenshot image dispalying these steps :

1. Open System Properties in the Windows XP Control Panel
2. Click the Hardware Tab in the window that appears
3. Click the Device Manager Button on the Hardware Tab
4. Plug in your device download cable/cradle to your computer
5. Open the Ports section of the Device Manager
6. Double click on the Usb to Serial Comm Port that appears after plugging in the device download cable/cradle to your computer
7. Click the Port Settings Tab in the window that appears 
8. Click the Advanced button in the in the Port Settings Tab
9. Open the COM Port Number menu and make sure a vlaue of 16 or lower is selected.  If a value greater than 16 is selected, change it to an available number less than 16, then click OK
10. Once you change the com port Windows has assigned to the cradle to a number less than 16, you should be able to follow the normal download steps successfully:
    http://support.trainingpeaks.com/trainingpeaks-wko/managing-your-data/device-download.aspx