[bighap]

Click advanced options. I am guessing that "default burn engine" is selected. If you have an updated version of Nero, try selecting "external Nero program" but don't check the box under this option. If for some reason this doesn't work, try checking the box. Be sure you aren't doing anything else while burning either. You might even want to close or disable running applications as the burning is very sensative. Give these a try and let me know how it goes.