Matshita dvd-rw will not burn dvds but will burn music cds

hi there i have just started having this problem. I use winavi and nero to convert and burn dvds. it has been working fine up untill couple weeks ago were i have started having a power calibration error i have looked at other ppls problems but still can not get dvds burning.

my error report says - power calibration error and could not perfrom end of DISC-AT-ONCE i have tryed other burning software and all the same.

i have a toshiba laptop with the MATSHITA DVD-RAM UJ-841S dvdrw drive like i say it will burn music cds but will have nothing to do with dvds.

anyhelp would be really good thanks

Post the full logfile.