megabrite broken?

hey all. i have a single megabrite i got to try out, and am having trouble getting it to respond properly. it powers up and it's certainly bright, but all it seems to do is strobe erratically and not respond to control.

when i upload arduino sketches while it's connected, it changes what it's doing... not sure why. the code is taken directly from the macetech site and the pins are all correct. just wondered if anyone else ever encountered this ...

thanks ...

Can you post a pic of your wiring and power supply?