shell-command parameters

[rustom]

When I issue a shell command which is a pipeline such as say

echo 1 2 3; echo 4 5

in a normal shell I should get
1 2 3
4 5

However in windows for emacs shell-command (M-!) I get
1 2 3;echo 4 5

Any clues??

The worst part is it sometimes works and sometimes not!