Can't access admincp?blank page shown
 

HI all i downloaded my vb 3.8.5 today and wanted to do a fresh install.everything was fine everything run well but admincp page doesnt load....i tried modcp page its does load well but i cant access admincp.whenever i tried to open that page it will load a while and display a blank page.any idea wats going on?
Izzit the script?the installation?or the webhost?

pls kindly enlighten me first time i have problem installing a vbulletin