What i did was uninstall both EB and RTW then reinstalled them. After installing EB, make a copy of the EB icon and then add it to your main RTW file.

Also, when you are installing EB, check to see if you are installing it in your main RTW folder. On my computer I was installing it ino C:/Program Files/ Activision/Rome Total War, and I had the exact same problem you did.

However, when I reinstalled EB, I changed it so it installed to C:/ The Creative Assembly/Rome: Total War. I then copied the EB icon into the folder. After that it ran perfectly. I advise you uninstall EB and then see if you have a different RTW folder (try C; The creative Assembly or C:/ Sega, if those are in your Program Files (which could be the "main" one, to reinstall it).

Hope this helps.