2003 Server SP2 and Vista

I have been using Vista fulltime on my laptop which is my primary machine at work and at home. Everything has been fine until I started testing SP2 for Server 2003. I installed it on a server that I use to store Apps, Images, etc… on. Ever since I installed it, Vista is having a hard time connecting to it through Remote Desktop or just accessing a file share. XP and 2000 connect fine, but Vista takes forever. I have also tested with other Vista machines and they all connect very slowly. has anyone else experienced this or does anyone have an idea as to why?