how to install iis in axapta when the entire setup is already done

hey !!! i am currently working on the workflow and alerts . i configured the entire workflow, made the pr and submitted it too . the problem i am getting is i am not getting the notifications on any chosen user . i guess the problem is probably with the IIS installation . I am a windows 2008 R2 user . needed help to in installing the IIS to my ax2009 without running the entire setup all over again . anyone with some suggestions would be appreciated . kind o urgent it is