Sample tracks no sound

[Oliv Oliv]

In one particular project my samples from track 7&8 are playing but not giving me any sound. 
I tried resetting all the FX parameters since there could accidentally be an FX somewhere that edits the sound in a way that it is beyond audio range or something. The only problem is that when I try to playback samples in the sample slot screen there is also no sound outputting. Tho in the sample load screen it is outputting audio. 

Any idea what might be the cause for this?

[XORadmin]

3 possibilities:

1: Track is muted (you can see that if the track is greyed out)
2: Audio is muted (press patch on a sample track twice and check in the track setup screen if the individual audios are muted)
3: Envelopes are activated on the audio volumes

[Barney Rubble]

Is it possible you have muted those track 7 / 8 ?