``````\tableofcontents
\listofalgorithms

\thispagestyle{empty}

\newpage
\setcounter{page}{1}
``````

That were running well but when the number of pages ! increased it disappeared :S

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Did you compile your document twice? If the problem persists, please add to your question a minimal working example illustrating your problem. –  Gonzalo Medina Jun 4 '11 at 21:43
Compile * Not Run –  amr Jun 4 '11 at 21:51
If, for some reason, the auxiliary file .aux was deleted, then you need two compilations to generate the ToC and the list of algorithms –  Gonzalo Medina Jun 4 '11 at 22:38
Did you compile your document twice? If, for some reason, the auxiliary file `.aux` was deleted, then you need two compilations to generate the ToC and the list of algorithms.