Login for sam 2007.1 for the first time?

hey!

so i got Sam 2007.1 of my friend which apparently is a linux product!

it is working on my otherwise broken old laptop, i got as far as setting my language,keyboard,time and internet connection (did not have an Ethernet so so internet when i started it up) and then it loaded the login screen

it came up with guest...and then said username with a box...i tried putting in guest, root,admin and even my username that i regularly use....but none worked....i couldn't log into guest either

i got the error message

"Authentication failed.l letters must be typed in the correct case"