[PHP] Problem uploading large files via PHP (20+ MB)

All, I am attempting to upload a large file via PHP to a web server running Windows XP Pro IIS 5.1 and I am having some problems. I have been trying to find the right combination of settings in the php.ini file and elsewhere to get large files to upload properly, but I keep getting a DNS error

Re: [PHP] Problem uploading large files via PHP (20+ MB)

Well, I tried the process with Mozilla and the transfer was blazing fast compared to IE and it completed successfully with no DNS errors. IE is very slow and consistently gets those DNS errors. I did turn on logging and found that this error is being produced whenever the DNS error shows up: