I had the same problem during the installation. The installer located my FS9 folder on the same partition, where XP is installed, but FS9 is on a different one. I didn't notice it during my first installation attempt, and this one ends up with error messages during the compile process.
I tried it again and with the right path to FS2004 and what happens after the installation? Nothing at all, no compiler, no call signs and no traffic.
I compiled the traffic with the editor and now My Traffic2004 works.
It seems to me that the installer did not check the registry for the FS2004 location, so this problem could happen to everyone who has FS2004 not installed on the same partition as Win XP or any other OS.
Nothing is written about this problem in the manual, and there is another incorrect statement: You can also run MyTrafficSoundPatch.exe from the CD manually. There is no such file, because the download only contains the MyTraffic2004.exe. The only way to use this file is to take it from the temp directory which is created during the main installation process, but if you quit the installer after the installation all temp files are deleted.
I used MT2004 only for making the screenshots for simmarket (most of them are also on the MyTraffic website :wink: ), but I work also on a review for simflight.de. I hope you can fix this problem for the unexperienced users or add a better explanation to the manual.
However I like My Traffic 2004 very much :D and will use it for the next two years.