Blat doesn't send email when run from Windows scheduler

"[email protected] [blat]" <[email protected]> 17 Jun 2018 03:22:48 +0000

Newsgroups	gmane.mail.blat
Message-ID	<[email protected]>

Can you please help me on a BLAT issue ? I have a batch file where I use BLAT utility to send emails using SMTP server. When I run same batch file from a dos shell manually, the email is sent properly. But when I schedule the batch file to run from Windows task scheduler, the BLAT doesn't send any email.
 I am using Windows 7 and the BLAT version is:
 Blat v3.2.19 (build : Nov 18 2017 03:14:35)
32-bit Windows, Full, Unicode