Having an issue migrating a wordpress-mu installation that I have running with cas authentication enabled (using wpcas and phpcas 1.1.0) from apache on an ubuntu machine to IIS on a windows 2008 machine. While CAS authed fine under linux, I'm getting a "CAS Authentication failed! You were no authenticated." page that pops up whenever I enter in a correct login. Anyone know whats up or if there are some logs I can look at to get more info?