Note that this thread is over a year old, but it states what is wrong with the mod in question. Thermal Foundation should be using the correct system now, + you don't have more than 30 listed entities (less than 128).
Have any mods in the pack updated recently? If so, if they used the non-Forge method of registering entities, that may be what is causing you trouble. And they should fix it.
Have any mods in the pack updated recently? If so, if they used the non-Forge method of registering entities, that may be what is causing you trouble. And they should fix it.