I forgot to mention i dropped the stage down to 1200px with the same results
I'm not sure this will help but I noticed that your png files sizes are quite big, try compressing them down using https://tinypng.com
Another option would be to convert any timeline based animation to code using something like http://greensock.com/ but that all depends on you confidence with coding.
Sorry I can't be more specific but hope that helps.
Thanks for the response. I will try compressing them down. It might be the 160kb png that is causing some problems. I have never tried the base animation coding, will check it out, unfortunately for me time is of the essence! Thanks for the links and suggestions, let you know how it goes
ddhayles not sure if it has worked yet, but thank you very much for the link to tinypng, it has cut the load time down by about half.