Cubase 6.5 audio sounds later than visuable wave

hi there,
something strange happened. i´ve just “re-organized” (at least this was the purpose :unamused: ) some audio folders and renamed them acording to the project name.
of course i had to show to the cubase project where its audio files where … and everything went fine.

but - when playbacking the track - one of them (and only ONE !!) produces the audio signal later than the wave i see on the project window. it´s constantly about one second after the visible wave.
how this can be ??

as all of the tracks have been into the same folder how is it possible that all the other tracks sound and only this one´s got a “latency”???

please help me ! :cry: