SiN

your tdk's are probably also Moser Baer's btw.

best I can suggest, without having more info from you, is

1. use the latest Nero. Always.
2. Defrag your hdd.

3. check out this place, especially the forums. http://www.cdfreaks.com/
I've been burning a crapload of data lately, and done a bit of looking around the site.
way more than anything you'd ever want/need to know. but should be able to help with basic things too.

.. files not burnt properly ... do you get a successful burn, and then have read errors/copy errors/crc errors? or, does it simply fail burn at the end?
how full are you packing these discs?

__________________