Sony (25DPW47LS2/T) (25DPW47LS2T) 4x DVD+RW Storage Media (25 Pack) "lg recorder recognising discs" Questions

LG DVD Recorder problem LG RH188S Recorder won't recognise Sony DVD+RW although these discs are recommended in the M/C manual. is the drive a dvdr or dvdrw? if its a dvdr....rw's wont work