nero vision ...... help please

angie1

; A+ [, X! m8 w3 H9 x% @* k公仔箱論壇
, V" f' o8 n8 a5 `5 v! Zi had already converted rmvb to mpg. i use nero 8 to burn  dvd. but why when6 o9 c% N, _8 I. c' b
i add file , it came out a message like this : unabe to insert C:.............
: A9 ~* c) R6 ^7 P- u; xjust cannot add, why ?
1 J& `& T; D3 q& l+ J/ b' `can someone help please
% @) h- F  D* u+ h, h9 }& V+ g公仔箱論壇thank you