Failed to upload files and have problem with Email setting

Hi, Everyone,

I'm green to use this Software for my new store.

It's looks perfect. But when I'm using it. I find there are some problem right now:

  1. When I edit some thing, such as product description, I can not upload files in to the sites, I had chosen a file, but it said I need to choose at list one file, but I really had chosen one.

    The other problem is at first, I use software email sending setting. It's OK. But when I change it to my SMTP server.

    It also refused me choose an section such as Store, Shipping Setting, Security.

    Anyone can help me???

    Waiting for your help.