SSI Exec command output

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Win2003

Windows

Apache

I hvae installed an Apache-Tomcat 6.0.35 on a win-2003 server and with quite a lot of effort, I got it working, mostly! Then I enable the SSI and can see the command
like

<!--#echo var="date_local" -->

<!--#exec cmd="net start MSSQL\$TRANS" -->

etc. working. The net start command gave me confidence that something is working.
And I can start the net service as well.

Then when I try:

<!--#exec cmd="dir /b" -->

I got nothing print out! Similar command in Linuxmint with cmd="ls" seem work!

Furthermore, I set file myshell.bat with just a dir command and then try:

<!--#exec cgi="cig-bin\\myshell.bat" -->

and it would me error in executing the directive. I have setup the cig-bin and the
shell file myshell.bat to be executable by Internet user.

Can anyone help?