Once the file (WWMI.exe) has downloaded, double click the 'WWMI.exe' file to start the installation.
If you are prompted to run the installation as Administrator, select yes.
After installing you will need to call Datamax 086 086 4868 for you mailbox setting which must be entered under Setup - EDI.
After entering the configuration details call again so that they can check that the communication is working correctly.