What is the exact problem? The DSS V6 doesn't boot?
Have you checked if the md5 sum of the downloaded iso file is correct?
Do you use a 4GB SSD or USB memory stick?

In order to install this version on a USB drive, please proceed with the following steps:
1. Download and uncompress the file dss6.0upXX_xxxx.oe_i.zip
2. Format a USB-stick partitioned as a FAT or FAT32 for the root directory (at least 512MB media size)
3. Copy the uncompressed directories and files onto USB-stick
Directories: bxxxx and boot
Files: mmenu_upd.sh
4. After copying the directories and files please verify that in the root directory resides:
bxxxx <DIR>
boot <DIR>
mmenu_upd.sh
5. Access the directory called "boot" then run the bootinst.exe (for Windows only) or bootinst.sh (for Linux only).
6. Boot your storage server with the USB-stick. (please set the BIOS to boot form USB-stick, or in boot menu select USB-stick to boot)

BR,
Tomek