I do not recommend switching between leveling mods mid-playthrough. If you're going to install my mod on an existing character, the best time to do it is immediately after you level up (at least, with the vanilla leveling system). Otherwise, any skills you advanced at that level will only count for 1% of what it takes to level up with my mod. I'd also suggest not using my mod right now; I'll try to have the next update out by this weekend, but the current version (that I've set to hidden on the Nexus) still needs some ironing out. I rushed it, I'm sorry :T.
Is it just your progress to the next level that's stopped? Have your skills been advancing normally, and just not adding to your level progress? When you changed leveling mods, did you make a clean save between each one (eg uninstalled one plugin, ran the game and saved, and THEN installed the next)? Sorry to barrage you with questions, but the more details, the better we can help.