Install Enterprise Portal and Role Centers

Hi Dynamics Ax Community,

I am currently doing some installing / add enterprise portal and role centers. I created a new sites with port 175 to be use to when I install the Enterprise portal and role centers, but at the end of the installation the status shows "Error". I am wondering is the ports cause this? or where can I find any reference for step by step installing enterprise portal and role center in Dynamics ax 2009. 

Thanks.