nero vision ...... help please

angie1

& m+ y: G4 j  e. h" A* N# ?& A. @& \! {
7 R  B, W6 A! h, D7 u% mtvb now,tvbnow,bttvbi had already converted rmvb to mpg. i use nero 8 to burn  dvd. but why when
+ n2 p/ t  v. ^8 v" Ui add file , it came out a message like this : unabe to insert C:.............
+ Q( g' t" z* e9 s# I5.39.217.76just cannot add, why ?5.39.217.766 ]/ h8 o( I) o* \/ G, x
can someone help please
9 @! k  U9 G$ m/ S- I% nthank you