DVD-R Help (XBOX)

[Xbox Viper]

I need some help.
How I burn a DVD-R whit more one games ?
I have a XBox whit X-ECUTER (the first release), and what models or DVD-r must i use for XBox ?
I have a DVD-R whit 5 games, i put that in my XBox but only the logo of the XBox apears two times and then apears that mesage that says to i verify if is a DVD movie, a game or audio CD.
I have the game ISS 2 in CDR Vivastar burnted at 12x and it works but don't always.
What i must do to burn perfect DVD-R ?

Thank.
Bye.