DVD Maker on Vista - Failing to burn

I have been using DVD Maker fairly often but recently after waiting for it to
encode and then begin to burn, it gets near the end an then spits the disc
out telling me it encountered a problem and could not burn. I am burning the
same files and doing the same as always. Can anyone help?

Also, is there a way to add text links (like Nero autogenerates) or extend
the time the audio plays on th menu?

Thanks
MB