Adding custom FGD to sourcesdk 2013

[Garrador]

Hi. I'm trying to add a custom FGD file (for my mod) to hammer using a setup for sourcesdk 2013. Everything is working just fine, I can compile maps and load the default "base.fgd" and "hl2.fgd". However, when I try to reference mine(either in Hammer, or in the "GameConfig.txt"), it crashes. Not immediatly, it just runs into some kind of infinite loop and I must force-kill the process.

Nothing is wrong with the entity definition, as it works fine when I put it in hl2.fgd. I really want to have my own fgd for organizing.

Any ideas?

Regards,
Oyvind