On some installs of Anywheremap WX version 1.6x the settings file will have changed, and this may cause the XM WX features to not work properly.  To check the settings in Version 1.6 and greater, you should click on file>settings>wx settings>XM WX. There you should see the 5 digit XM software activation code, Enable XM should be checked, and it should be set to serial cable on com 1. You may also need to go to file>settings>gps settings and reset your GPS com port for the gps you are using. Once you have these settings selected, you should close Anywhere Map by doing a file>exit. Then start anywheremap again, and it should download the WX for you.