question about session PHP

I hope to write well. Thanks for all for the response. My appl Apache+PHP in Win32 system use PHP_Session fecture. The cookies session are store in the path D:\OPENFEDRA\Apache\htdocs\fedra\sv\src\tmp The php.ini are fine configurated. all work fine. Only when I reuse and re-start applicazion (exec apache.exe and qith browser I call back the main page like : http://localhost:8081/fedra/sv/src/html/home.htm i have these error: Warning: unlink() failed (Permission denied) in C:\OPENFEDRA\Apache\htdocs\fedra\sv\src\html\benvenut.php on line 10 Warning: Cannot send session cookie - headers already sent by (output started at C:\OPENFEDRA\Apache\htdocs\fedra\sv\src\html\benvenut.php:10) in C:\OPENFEDRA\Apache\htdocs\fedra\sv\src\html\benvenut.php on line 14 Warning: Cannot send session cache limiter - headers already sent (output started at C:\OPENFEDRA\Apache\htdocs\fedra\sv\src\html\benvenut.php:10) in C:\OPENFEDRA\Apache\htdocs\fedra\sv\src\html\benvenut.php on line 14 The script are this: <? /* session_start(); session_destroy();*/ $handle = opendir($FolderTmpExt); while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { unlink ($FolderTmpExt."/".$file); (line 10) } } closedir($handle); session_start(); (line 14) include_once ($xPathLibraryExt."functionXpath.php"); External file where i have config of the application call into the script by pre_append option in the php.ini $formPhpExt = $document_root."/fedra/sv/src/formphp/"; $srcJsExt = $document_root."/fedra/sv/src/js/"; $srcPhpExt = $document_root."/fedra/sv/src/php/"; $srcHtmlExt = $document_root."/fedra/sv/src/html/"; $FolderTmpExt = $document_root."/fedra/sv/tmp"; The reload of the page of the browser the error do it is lost. Have clean file session in the path ..../tmp + cache of bwsr but in any case I have the same error. I thinks, but i am not sure, it is a problem depending the Apache cache. Have sameone an idea about this error? Ciao Franco