Re: 11month old refuses to sleep
Im sorry. I know what its like being sleep deprived. Is there another room you can put her in? Just maybe in a playpen so that she does not bother the toddler. Even if she wont sleep, it could give you a place to lay her when you need a break from her fighting sleep. Sometimes if you can let her cry some, she will see its not getting her her way and it will help. I know its hard to do with another child in the house though.
My daughter didnt want to sleep either. I started doing bedtime really early (530-6ish), starting with a warm bath, low lights and nighttime music. I would lay her down by 7ish. That way even if she woke up alot, I would still get some sleep in between. Once I started bedtime, no playing or running around. It was all calm. You can even have your toddler do quiet activites during this time as well.
It usually gets better as they get older. My daughter started sleeping good at about 24 or so months and now at 6 she sleeps as long as I let her. I know its hard, but hang in there!