Problem solved!
I uninstalled arduino and teensyduino and reinstalled them one at a time and this time only added neopixel library that's included with the teensy (as thas all I need) and so far it's working like a dream. I can only put it down to a conflict somehow of libraries that installed with teensyduino originally.
Thanks again Mel for your help trying to get me sorted.
Now is there anyway of getting this to work with common anode as I have seen some cool blue matrices but they are only in CA and not CC 