So.. it does work on a plain WordPress without any other plugins? The you should try and find out which plugin is blocking Trackserver from functioning.
In my tests on your website, the initizalization code for Trackserver does not get run, so there is something breaking the Javascript execution.
The colors of the start/endpoints are hardcoded, I’m afraid. You can change them in ‘trackserver.js’, but you’ll lose the changes when the plugin gets updated (which will happen sooner or later, I promise ;-))
I’m not sure what you’re asking with your question about the weather. My plugin has nothing to do with the weather.
Best regards,
Martijn.