Unsupported audio buffer size in device control panel

[TheVRsNo$]

"Your audio device is configured with an unsupported audio buffer size. Please select on of the following supported buffer sizes in the device control panel: 32, 64, 128, 256, 512, 1024, or 2048."

^^^ This is my error message when trying to open Pro Tools 9 with a brand new Tascam US-800. My laptop is a HP DV7-4285dx. I am new to Pro Tools and this device. I've had them both now for over a week and haven't even had the option to create a new project w/ Pro Tools yet or even completely open it! But I do know the Tascam is recieving the signal

So ^ is my problem... I feel like my brain is burning from trying to figure out how/where to change my "audio buffer size" or bypass this error message and finally create a project. PLEASE HELP!