pb with header already sent

Thursday 30 June 2005 7:05:59 am

Hello,
I m using some librairies, like fpdf, and excel stylesheet write from the Pear Framework,
And my extension that deal with these files can't show me the pdf or excel because of header that are already sent.

I made a page layout without anything in it,
And my extension does not display anything.

I don't know where i can disabled these header...

An idea ?