The New Girl, how to get along with the other women?

I waited a few years before looking for a new job with a better salary. I did it to save myself and my health. I had an easy job, I got along with everyone and I even got recommendations when I decided to look for another higher paying job. Finally I looked and looked and finally I got the phone call. I went in for the interview, they all seem to take to me right away and all my years of experience as a lab technician. I do it for the military as well. Plenty of experience, only really no experience working with kids and drawing blood from them and babies. I knew that would be a challenge. I like a good challenge.
I started work and began my training. Even if I knew something I wouldn't jump out and say it right away. I didn't want to be labled a know-it-all. The training has worn on, they said I'm a very quick study. Then came the office politics. I tried to stay out of being the knew gal. But, I don't want to be stepped on either. A few came up to me and said watch K, she will stick you with everything, she is the lazy one. I said, Uh...I don't think so. I said, I'm not new to this field, I'm new to this office. So she did take advantage of me, but I put my foot down a little. She kind of got the hint.
Now, I find myself being the brunt of all the problems in the office. If something goes wrong, they immediately are quick to go to the supervisor and say something about me. Ones I thought were my friends, quickly turned on me. One girl who is soon to be my partner on 2nd shift, totally floored me yesterday. She sent out a mass email, including to my BOSS talking about how one of the anylzers was not properly unloaded. I knew this was my mistake, as it was only my 2nd day on the machine, I'm still in training. But she totally told on me. In this very smart letter. Somedays these people act like really decent human being to me and others they treat me like crap. More often like crap. I don't get it. I rarely talk, I do my job now and try to enter in a conversation, only to be not even heard. This is only my 2nd month on the job and as far as I know I've picked up on everything very quickly. What is the problem? Is this just me being the new girl? Did I mention I work with all women? All of whom who have worked their 30th plus years. The one that sent the email, started back in july 08. It hurts to be turned on like this. I did comment back to her on an email. I was nice about it. But why didn't she just come show me what I did wrong, instead she had to broadcast it. Now my boss is like, well....looks like your having problems on the machine, we are going to have to extend your training on it. It was a simple thing, that I wasn't sure about. Not something that will take me more weeks to learn. I'm SO ANGRY. I don't know how to fit in here. This is exactly what I was afraid of, when switching jobs. I need some sound advice here. What is going on is so catty. The other new girl is trying so hard to be liked by everyone she stabs me in the back. I don't get it, how can I survive this?