I've installed CMS MS 4 time yet and i can't access my administration panel, i've installed it online, and when i do "url/admin" it comes a white page, with nothing, really nothing

I hope you can help me

thanks.
- did you do a checksum file check?I've installed CMS MS 4 time yet and i can't access my administration panel, i've installed it online, and when i do "url/admin" it comes a white page, with nothing, really nothing