nero vision ...... help please

angie1

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' S3 u( N$ n: T5 @1 {- G( Ytvb now,tvbnow,bttvbi had already converted rmvb to mpg. i use nero 8 to burn  dvd. but why when- w5 d- L2 v! Y' {* M
i add file , it came out a message like this : unabe to insert C:.............* F; T+ _0 u7 ~
just cannot add, why ?tvb now,tvbnow,bttvb; Z" _2 S* ]; O4 U+ w: v
can someone help please
  d2 _: E: }( s0 o5 H# mwww2.tvboxnow.comthank you