[otrs] Problem with statistics in graph

Hi all, When I try to view any graph stats, I get the following error: The image "http://mysite.com/otrs/index.pl" cannot be displayed, because it contains erros. Any others stats, like csv are running fine. Any help please ? Thanks all. _ _ Rodrigo R Morais _ Analista de Suporte II _ Divisão de Tecnologia e Projetos _ Contrix Consultoria - www.contrix.com.br _ 55 61 3349.7979 _ _ Citrix | SurfControl | Webtrends | Altiris | NDDigital | Symantec | CA |Aker _ VMWare | Bluelance | Wyse | Novell | Symantec | SourceFire | SPI Dynamics | Microsoft