[SOLVED] x-fade is not working properly

[Steve_Mutter]

I have a problem with the function x-fade at cue lists. the cue is on a fader and is set as x-fade. but the chimp does not fade from one step to the other but always turns hard in the middle. 
Under fade I show that I can thread slowly between the cues, or I see that wrong? 

Did you make sure that the data in the cues between which you want to fade are fadeable?