Hi again, just found some more info, xo please excuse the second mail.
> > I'll hope it's my fault... but i really don't find where i'm wrong. > According to http://www.tex.ac.uk/cgi-bin/texfaq2html?label=tmupfl it is ;-) "The error also occurs [...] [if] you're inside it long sequence of figure or table environments, with no intervening text. Unless the environments will fit "here" (and you've allowed them to go "here"), there will never be a page break, and so there will never be an opportunity for LaTeX to reconsider placement. (Of course, the floats can't all fit "here" if the sequence is sufficiently prolonged: once the page fills, LaTeX won't place any more floats, leading to the error." So the long sequence of floats triggered the error. Perhaps you should consider putting some text in between them? (Or use one of the methods in the earlier mail)