I'm not familiar with "alpha" brand discs either - go to http://dvd.identifier.cdfreaks.com/ for DVD Identifier and download it - it'll usually identify the actual manufacturer from the pre-recorded info located on the hub of DVD +-R discs, BD discs, etc. It should also indicate the true max record speed.
I would also update your drive firmware with the latest version.
If all that doesn't work, then try progressively lower burn speeds.
Finally, you can get Taiyo Yuden discs online fairly cheap, and they generally are recognized as the highest quality and longest-lasting DVDR discs available. Some of the online blank media sales sites have fairly informative ratings as to the different brands and where they fall in terms in quality. Meritline used to have an updated quality listing but I don't see it there anymore.
Tried using the imageburner program, which did help, it actually did burn the image onto the dvd, but afterwards when it had to verify the dvd content it failed at 96%, and the dvd was unreadable for my dvdplayer..
You still think a firmware update could do the job?
Just did the firmware update, didn't work for me either..
Hmmm.....starting to sound like you got a bad batch. I have seen cheap no name disks fail at AMAZINGLY high rates before. Not sure what else to tell you to try other than a different burner. Maybe borrow a friends for a weekend........Or eat the loss on that batch and mail order some quailty media.
With the shop link I guess you are in Denmark? I really have no idea what media is available in Europe so I cant recommend anything good and cheap there.
tried burning them at speed 2x, still no luck with the others burning programs, did get lucky once though with the imageburner.. seems like it can burn onto the discs, the failrate is just quite high..
But yeah I probably just gonna order again, from another brand.. hopefully that will do it.
I've used a lot of different brand DVD's...HP, Sony, maxell, magnivox, verbatim, ridata, ativa....and on and on....Any spindle can have a bad batch. I've noticed certain brands have more tendancy than others. HP is one of the pricier brands, but is the worst I've used. Even the cheaper ativa and ridata discs worked well.
By far though, verbatim is the best. Rarely ever a bad burn.