Hi since i can log into firefox then atleast i can get access but im sure the reason i cannot get into admin on ie9 is do to this issue off your instal faq page
IE Cookies :
IE (6,7 and 8) does not support underscore "_" in the server hostname. If it is the case, the cookies are not managed and cookie(s) is(are) not set. So change the server hostname under apache or IIS.
And here is my problem with this, i have no idea what your talking about, what do you mean server hostname, are you talking about in the config file? on the server? where ? i am using the default localhost. Please tell me how to change this for ie and where to change this thanks.