indention in cc-mode not as expected

[mfl <mofliwsb@gmail.com>]

I am trying to indent the following code using c-indent-region

void foo()
{
if(true)
{
foo1();
foo2();
}
}

I want to get the following:
void foo()
{
	if(true)
	{
		foo1();
		foo2();
	}
}

However, c-indent-region keeps generating the following:
void foo()
{
	if(true)
		{
			foo1();
			foo2();
		}
}

I tried different values for these options: c-tabs-always-indent, c-
insert-tab-function, but none of them worked.
Can someone please help me on this? or is there a function to do "tab-
to-the-left" for a region in emacs?
Thanks.