This is a re-occuring problem with our software provider, my apologies!
Often times if you just scroll down on the page so there are three Inches between the button you want to hit (send) and the bottoms of the screen, you will be fine. I’ve had this very problem and this is how I solved it.
Also switching to Google Chrome browser seems to really help people. (http://www.google.com/chrome?&brand=CHMB&utm_campaign=en&utm_source=en-ha-na-us-sk&utm_medium=ha)
Thanks,
Scott