Using the live function ?? help...

Using the live function ?? help...

I am currently working on a project where i am using the jQuery Calculation plugin http://blog.pengoworks.com/index.cfm/2008/1/23/jQuery-Calculation-Plugin-Making-calculating-easy to do some math functions in a dynamic form, the issue is that when a new set of fields is created the calculation script only pulls data from the ones there when the page loaded, i am fairly certain that what i need to do is use the live function, however i am not very familiar with it and still learning, I was hoping someone could advise me and help me with figure it out.My jQuery for the plugin is :
$("input[name^=emem]").sum("keyup", "#totalMem");