Error: C is undefined

Hi

I'm trying to set up the new FCK editor. On my local machine it works fine, but when I upload it to the server and try to use it I get the following error in Firebug and the editor area doesn't load, and the empty FCK debug window pops up:

Firebug:
Config is loaded!
C is undefined ...fckeditorcode_gecko.js (line 99)
LoadToolbar()
GetInstance()
GetInstance()
LoadToolbarSetup()
onload()
[Break on this error] function FCKToolbarSet_Create(A){var B;v...0;i<B.length;i++) B[i].RefreshState();};

This also happens on the _samples/