problem uploading BIG files

Hello All, I have a problem uploading big files. 23MB range. I already changed the max_upload_filesize and the post_max_site to 26214400 byes (25Mb) and the timeout (set_time_limit) is set to 0. No limit. Since I'm testing over a lan uploading goes fast. I see it going for a while and then suddenly get an error result for moving and chmod'ing the file (Mozilla) or a page not found (IE). PHP is the 4.1.2 version. I'm realy clueless why the upload is aborted. The timeout it shouldn't be as I don't think I make even the default 30 seconds. There diskspace enough on any partition which could have to hold the temporarilly file (the smallest partition still has 700Mb free) The values for max_upload_filesize and post_max_site are verified though the phpinfo() and are set. Anybody who can shed a glimps of light? Gerhard -- ICQ: 4502226