Apache vs IIS current directory fro Perl script

Hi there, I try to switch from IIS 5 on Win2k to Apache 2.2 on Win2k. None of my pictures where shown on the new Server. Some tests showed me that whenever I try to check if a file exists with if(-f "pictures/ photo1.jpg") the files where no longer found. My scripts are located in the cgi-bin directory below the document root of the website.