Session Problems

Hi all I have developed a session enables site under Linux/Apache. I have now moved my development environment to Windows XP Pro/Apache I have changed a few (minor) paths from absolute to relative paths, and now my sessions do not work... Error message: *Warning*: open(/tmp\sess_80d92f298761864b71d80a0f9a8302e1, O_RDWR) failed: No such file or directory (2) in *c:\webpages\intranet\phpinc\stdinc.php* on line *20* *Warning*: Cannot add header information - headers already sent by (output started at c:\webpages\intranet\phpinc\stdinc.php:20) in *c:\webpages\intranet\phpinc\stdinc.php* on line *27* Line 20 is merely a session_start(), while line 27 is a header("Location:nextpage"); I can only assume that it a directory permissions thing - where do I find the directory. (/tmp\sess_dfhaskdjf;ljkds Thanks David R