Issues Scraping Artist Info

I seem to be having an issue scraping artist information. I'm using XBMC 11.0 and I've downloaded and selected the Universal Artist Scraper in my system settings. However, when I try to scrape my collection, it sees all the artists, but breezes right past them and collects no data. So, I've found the only way to accomplish this is to browse by music by artist, select 'change scraper' (the scrapers I've downloaded are listed, but none have blue text indicating they are selected), select Universal Artist Scraper, and then I can scrape the artist info - for that one artist. I have to repeat these steps for each, individual artist. What could I possibly be missing that might cause this?

Thanks for your help