Your problem is fairly well known, but very little to nothing can be done about it. The issue is the Nvidia SATA chipset used on your board. Nvidia tried to enter the CPU support chipset business, but failed and quit that side of the PC business. They also ended all support for those products, as in no new drivers, not even fixes. The mother board manufactures that used these chips also provide little to no support for them.
Nvidia SATA chipsets (SATA II support at most) and the Nvidia drivers are known to set the SATA interface speed of SATA III SSDs, to SATA I speeds. The driver apparently cannot recognize a SATA III drive, so sets it to SATA I speed. That happens will all SATA III SSDs. The drivers also don't support the AHCI SATA mode, which is necessary for the best performance from any SSD, as well providing modern drive features and the latest SATA protocols. Using a SSD on your board basically cripples its performance.
The bottom line is, the SSD Toolbox will most likely not work with your mother board. If you are using Windows 7, you can try to use the native msahci driver, but that requires you can set the SATA mode to AHCI in the BIOS. Most boards using your chipset cannot do that. Frankly, the Nvidia SATA chipsets are considered obsolete due to the lack of manufacture support, and all the problems they have.
The only true fix is a new mother board, sorry to say.