automake does not create Makefile.in

hi all,

I have written a simple C program hello.c and a Makefile.ac but when i try to run automake it does not create Makefile.in hence I am not able to run ./configure command in my directory. Following are the containts of my prog.

hello.c
--------
Code:

#include<stdio.h>

main()
{
  printf("hi\n");
}

Makefile.ac
--------------
Code:

bin_PROGRAMS = hello
hello_SOURCES = hello.c

following steps i followed to create configure and Makefile.in

autoscan
mv configure.scan configure.ac
autoheader
adding AM_INIT_AUTOMAKE in configure.ac
aclocal
automake --add-missing --copy
autoconf =================> gives err as no Makefile.in generated.

Could any one let me know what went wrong ?

Thanks in advance,
Ravi