just installed 2010 in my windows 7 release candidate install. i have had to reinstall acad twice this week. each time i notice my plot styles are missing. so i click on the link about where are my plot styles and it says the help file is missing. if i click on plot styles from the file drop down it takes me to my "my documents" folder. i placed all of my plot styles in the default acad directory. why does this keep happening?