Monster 1.1.2 | Server Crashes

[Jlw-Servers]

I got this error when using monster pack 1.1.2, im using cauldron and couple plugins and the server seems to run fine but eventually it crashs. I find it crashs my launcher when i go into creative and click on the search button. ive disabled mobiuscore from the server.

Much appreciated if i could get some help on this. thanks

Error Below:
http://pastebin.com/zRaCdUEb

 

[tarzan1376]

1. Bukkit, MCPC+, or other Bukkit replacement
2. These may have caused this error, and may not be supported. Try reproducing the crash WITHOUT these mods, and report it then.

I just copied and pasted what it said inside the crash report.

So instead of running the server on a MCPC+/Cauldron Jar run it on a Forge ModLoader Jar. no bukkit AT ALL.

 

[nvrsbr]

Does 1.12 even work anyway ?
I tried running 1.12 and the server just crashes.

1.11 is recommended so 1.1.2 must not be complete.