To install applications to your Blackberry you must use the RIM Desktop Manager. Applications meant to be installed from the Desktop Manager come with two files: an ALX file and a COD file.

1. First, connect your Blackberry to your PC using a data cable.
2. Once the device is attached, launch the RIM Desktop Manager.
3. Launch the Application Loader from inside the Desktop Manager.
4. Click the "Add" button in the Application Loader and specify an Application Loader File(.alx). The application should now appear in the list of items to install. Follow the instructions from there to finish the installation and it should appear on your Blackberry.

Please see the below possible errors and solutions if you are still having trouble.

"No System Software was found for your handheld."

This can happen if you've either upgraded your handheld OS, or gotten a new Blackberry. Either way, your Desktop Manager doesn't know how to talk to your Blackberry. It is lacking the device software for your model of Blackberry.

You'll have to download and install the latest device software and service packs from your carrier. To see which device software you have installed on your computer, go to the Desktop Manager Help–>About and click the Device Software tab.

"No additional applications for your handheld were found"

First, make sure the .alx file and the .cod file are in the same directory. The Application Loader uses both files to install to your Blackberry. If that isn't the problem, then upgrading the Desktop Manager might help. You can download the latest version from your carrier or directly from RIM: http://www.blackberry.com/support.

"Invalid Digital Signature"

If you are running a BES Blackberry, there is a setting in the BES that doesn't allow the installation of 3rd party applications unless they have been signed. You will have to contact your BES administrator to change this setting.

"A fatal error has occurred while updating your handheld's software. Please try again. Unspecified error encountered [J:0×0000000A]"

That error message appears because the application you are loading requires a more recent version of the handheld operating system than you have. You will need to go to your carrier's website and download a more recent version of the OS.

To access your order history or download your software, for this or any other order at anytime, do the following:

1. Go to http://www.smartphone.net/blackberry/.
2. Click on "My Account" at the upper right and enter your User Name and Password. If you cannot recall your password enter the email address you used when the order was placed, check the button to the left of " forgot my password and would like to get my password via e-mail." and then click on "Submit". Our system will email your password to you.
3. Once you are logged into your account, scroll down to your "Download History."
4. Click on "Download" for the software you need to access the fulfillment information/download files or registrations codes for.

NOTE: Many products require that you FIRST uninstall the trial version before installing the full/paid for version.