I have a plush animal style one with a camera mounted in the nose, on this model, twisting the nose adjusts the focus.
Your's may have a similar focus system.
Drivers may also be your problem with the green issue.
Try google, or www.driverguide.com
or to quote another:
http://www.d-max.com.tw/support.htm
Grab the 1093US/UC/1001UC/1005 driver package.
Dranoweb.com
July 2007