I too am new to 3D printing and I just finished my own TwoUp printer. I hooked it all up and got a green light on the power supply box and a red one on my red printr board. I plugged it into my computer and although it did not install correct at first, I downloaded a serial install and got it to work after that. However, I can not get it to connect to RepetierHost. I set up the printer settings but when I go to hit connect I get a pop up saying "The connection failed with the following error: A device attached to the system is not functioning. Make sure your printer is connected, enabled, and connection data is set correct." I don't know what I'm doing wrong or where the problem is (did I mess up when installing the driver? Or does the problem go all the way back to the printr board? Is it just a RepetierHost problem?), but any help would be greatly appreciated. Thank you very much!