Problem with Sage Pay Payment Plugin

Hi, firstly, thank you so much to the developers for making a Sage Pay plugin!
Is there any documentation for it please? I am having problems getting it to work. I know this is not very specific, but I thought there's no point wasting peoples time if there are some docs I can look through. I have checked on your documentation page but there is no link on the sagepay part.

Thanks for your help,

Keith

thank you so much. I will be buying the full version of hikashop today. Great work, thank you!