Okay...your problem is that you are using a sendmail path for UNIX systems/servers. You need to identify the correct path for your sendmail path (if you have Blat or another Windows based sendmail program installed).
Contact your ISP and ask them if they have Blat installed or another Windows based sendmail program installed. If not, then you will have to use the SMTP Mailer routine, which has been written more than once in this forum.
If you do not have BlatMail or another Windows based program installed on your server, then search this forum for "SMTP" and my name "Eliot" in the user name blank in the search form. Also, you will need to download the Mailer.pm file from LINKS in order for the SMTP Mailer routine to work.
I wrote instructions on how to set up SMTP mailer routine.
Hope this helps.
Regards,
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Eliot Lee
Founder and Editor
Anthro TECH, L.L.C
http://www.anthrotech.com/
info@anthrotech.com
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Coconino Community College
http://www.coco.cc.az.us/
Web Technology
Coordinator
elee@coco.cc.az.us