Hi Alfred Rossi
As my good friend Jimbo pionted out you are not giving us much to go on, however you stating "Can't back up no movies sense last week" could mean that your having a hardware problem course without any details it will be hard to troubleshoot your issue.
are you having trouble during the analyzing, copying or burn process ?
if the analyzing of the DVD do you have Pathplayer set as "Always enabled" ?
if the copying process have you checked the transfer rate of the drive/burner to make sure it is in DMA mode ?
if the burn process which burn engine are you using ? and at what burn speed ?
whould also help if we knew what brand of blank media you are using