It sounds like your drive doesn't like them...... Can you open ImgBurn and then pop a disc that will burn in the drive, next can you copy and paste the log from the bottom window of the ImgBurn GUI into your next post here ?
This will tell us what drive model you have and also the firmware that it's currently using, it might be that the FW needs updating to burn the discs you have bought.
Generally speaking we only recommend the Verbatim DVD+R Dual Layer discs (MKM-001) dye made in Singapore.