Hi A.,
It may be that your daughter just doesnt want to take a break from the "action" to go use the potty. Maybe the novelty of using the potty has worn off, and there's just too many interesting things going on that she dosen't want to miss.
If you have a portable potty chair, I'd reccommend moving it closer to to where you and she hangs out, so she doesn't have to "miss" anything.
Use lots of praise, and maybe add a goal for her sticker chart that she can reach by bedtime (or maybe even just for making it through the most problematice part of the day), so everyday is a new chance to reach her reward.
When she does have an accident, do be sure to have her help you clean up. You might casually comment, "gee, this sure takes longer than just using the potty." or "Huh, I'd sure rather be (doing x) than cleaning this up, wouldn't you?" I'm not convinced that she can do the cleanup all by herself, and for my kids that always felt like a punishment and shame (why won't Mom help me do this?...she helps with everything else), but doing something together in a matter-of-fact spirit,IMHO is better.