limits in TSpectrum::Search() ?

Hi rooters,

I'm writing a code to find (hundreds of) peaks. As in the attached picture, the TSpectrum::search failed to find many peaks in higher bins, even with
  TSpectrum *s = new TSpectrum(10000,2);   s.Search(h,2,"",0.2);

Are there any limits in TSpectrum(::Search()) for the number of peaks?
(for example the number of bins in a spectrum, etc?)

Thanks in advance,

Yours,
Kazuyoshi

--
Kazuyoshi Furutaka
furutaka _dot_ kazuyoshi _at_ jaea _dot_ go _dot_ jp