ADD and BIOS without 48-bit LBA support

The whole reason for purchasing ADD is so I can use a 320GB HD on my eMachines m6811 laptop. Right now my laptop only sees 128 GB and there is no BIOS upgrade. FYI, I have Vista Business 64bit on the 128GB partition and Disk Manager only sees 128GB. I had tried using the DDO that Western Digital has, but it is not compatible with Vista. Anyways, Upon installing and bringing up ADD, I was excited to see that it saw the full size of the HD with around 171GB unallocated. I decided to create a partition with the unallocated space and assigned it a drive letter. I was able to bring up windows explorer and view the newly added partition. In my excitement I forgot to bring up Disk Manager to see if Vista had it listed there. I created a bootable cd and wanted to see what happened upon reboot. Upon rebooting, Vista would give me the BSD and reboot. I used the bootable cd bring up ADD. There were some errors reading some areas of the HD, but I was able to delete the newly created partition and boot into Vista without any further issues. Once I had Vista back up and started ADD, it could no longer see the full 320GB, just the 128GB. What gives? I had some work to do on another computer and came back hours later. I ran ADD again, and it could see the full 320GB. Very strange. I decided that I would use the bootable cd to partition the unallocated space. Well, the bootable cd only sees 128GB and now when I boot into Vista and run ADD from there, it once again only sees 128GB. Does it sound like I have a HD issue? I am running checkdisk now.
Any guidance would be great.
Thanks,
Rick

 

Does Support actually help anyone in here? It has been several days and no response. If this is not the proper way to get tech support, then they need to make it more obvious on their website.
Rick

 

Acronis does post in the forum, but it may be several days or longer.

I could be wrong, but I don't think DD will be much help in overcoming the computer's lack of support for larger drives. If it's not being detected correctly every time (assuming you manage to get a partition setup), I wouldn't trust it to work correctly and not become corrupted.