nero vision ...... help please

angie1

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i had already converted rmvb to mpg. i use nero 8 to burn  dvd. but why when
" A# S0 z# N: z  V5 twww2.tvboxnow.comi add file , it came out a message like this : unabe to insert C:.............
. z& X. f: ?* b# n, jjust cannot add, why ?
1 p. i+ H) |( T9 B$ ~' |  _can someone help please tvb now,tvbnow,bttvb* X9 I" M5 x5 m( t. P- G' D! I; o
thank you