My other thought is that it's very monochromatic. To such an extent that nothing quite draws your eye. In fact, I think the first thing I looked at was the 'Add to Gmail' button because it provided some contrast.
Why is the smallest text on the page the text that describes the features you offer?
I think on the whole you need to do a better job of telling the potential customer how you go about solving their problem. I get that it has something to do with tasks, but, for example, it's not clear what it means to "communicate through tasks, not lengthy emails." Does that mean it only works when other people are also using Taskforce?