Evolution acting up

A couple of problems have cropped up with Evolution.

  1. After lots of use without asking me for my email password, I am now asked for this every time I boot the computer and access Evolution. I can’t find the tab that would allow me to enter this password and have Evolution remember it. Can anybody help?
    2.Evolution keeps sticking and I have to force quit. The problem is linked to replying to sender; quite a lot of the time this is where the problem occurs. Most often, this is on new emails that are still in bold. Now can I stop Evolution freezing up like this?
    PS. Talk to me as though I am a four-year old please! Don’t assume too much knowledge…