nero vision ...... help please

angie1

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! _- G# ?8 V5 ~( Y3 I公仔箱論壇i had already converted rmvb to mpg. i use nero 8 to burn  dvd. but why when, u8 T* o' z5 _. Z$ }; F
i add file , it came out a message like this : unabe to insert C:.............
; F6 I: m! z* I: I( X3 Mjust cannot add, why ?
5 t: W* r! f$ j9 [7 j5.39.217.76can someone help please + {' s* u7 r, \. q1 g, f$ ]
thank you