Tekkit Crashing when i place a thermal monitor next to a nuclear reactor?

[Tristan Du Plooy]

so on my freinds server we are doing this rivel thing were we each get a full nuclear reactor for power and the only way we can blow our oponents base up is to over load ther reactor and i have a design that works from a previous version of tekkit that will detect a certain tempreture and start pumping iice in to the reactor from a condenser with a collector hooked up to it and this idea works perfectally except now i put down the thermal monitor and tekkit just crahes is this a bug in tekkit or with my computer PLEASE HELP ME