problem with changing the citation style!

I have been using Endnote the last months. My chosen citation style was Bluebook. Now I want to switch to OSCALA. I have downloaded it already. Even though it appears as the selected output style in Endnote when I insert the citation to Word it is formed according to Bluebook and not OSCALA. One by one I need to change all the citations and turn then into the OSCALA format. IS there a way to change all the citations at once? And why is the citation inserted into Word in the Bluebook format even though I have selected OSCALA? How can I solve this problem?

Thank you in advance!

You have to change the output style in Word on the endnote ribbon, (or the format bibliography tool, in older versions of Word) not in the Endnote program.  If you are working with more than one document, the last thing you would want to have to do is switch styles in the program itself each time.  The output style selected “sticks” once set in each document.