I am assuming your internet connection is fine and are these multi player ranked stroke rounds or by yourself?
Could be a browser or flash issue so look at the system requirements http://www.wgt.com/forums/p/635/2552.aspx
You could try a different browser.
If you are playing ranked rounds by yourself, this will give you the option of resuming the game when you press play now, if they are practice rounds they will not but would not affect your average regardless.