try this:
quote(from original macman thread)..
The Actual Problem:
With disk drives getting larger and larger manufacturers have had to change the default block size from 512 bytes to 4,096 bytes. These new drives are known as "Advanced Format" or 4K drives. Initially this was only seen on drives larger than 1 TB but will soon be on all drives. As part of this change there is an issue with OS X writing the boot helper code to these drives when booted from the drive. Because of this they require a workaround to boot on their own.
this post from mac man fixed this issue
Solution 1: Use UniBeast
Pros: Easy- OS X Only
Cons: Requires use of the Terminal and UniBeast drive.
How To Do it:
1. Install Lion Using UniBeast
2. Boot new installation using UniBeast.
3. Run MultiBeast and install as normal
4. Reboot system back into Lion installer.
5. Run Disk Utility and unmount the drive you installed OS Lion on.
6. Launch Terminal and execute the following command:
Code:
dd if=/Volumes/"Unibeast Volume Name"/usr/standalone/i386/boot1h of=/dev/disk0s2
In my case my UniBeast volume is called "OS X 10.7.4" so my command would be:
dd if=/Volumes/OS\ X\ 10.7.4/usr/standalone/i386/boot1h of=/dev/disk0s2
7. Exit Terminal
8. Reboot Normally
NOTE: The about instructions are based on OS X Lion being installed to a hard drive connected to SATA port 0. If you are using a different port you will need to get the drive device name from Disk Utility by selecting the volume and clicking Info.
this works!!!!!