I burned seveal RiDataG04 by BTC 1008 ( lateset firm 0059) x4 mode, but most of discs shows read error on dvdinfopro. (Nero or CloneDVD2 finishes writing). Dvdinfopro shows read error around 74%. I used Sony DW-UA50 x1 to burn, it writes without errors. Has BTC 1008 a problem, need a certain firmware or just a crap ?