Hello scotty,
Were still using version 1.6.4. Bukkit has not relased a version for 1.7.2 yet.
Please look at our announcements and there is a post in there about how to choose the version you play with. Choosing version 1.6.4 would allow you to connect to our server again. I will make another post in the announcements section when we upgrade to 1.7.2.