Hey! I had the same problem, and this worked for me: Start your technic launcher, select Attack of the b-team mod, and go to settings. Press "open folder", go to "mods", delete all "project red" files, install the latest build of project red (32 i think) from: http://projectredwiki.com/wiki/Version_archive#Downloads and pop all the .jar files into the "mods" folder!