for simplify3d you need to be using the replicator dual profile. OR flashforge creator dual.

Basically a replicator clone is a 3d printer based around the original makerbot replicator 3d printer. makerbot were stupid enough to make the design open source. So a bunch of chinese companies jumped in and started copying them - perfectly legally.
That said there have been a lot of incremental improvements and evolution along the way. So some of the current replicator clones are superior to the original machines in a number of ways.

Particularly with the updated firmware it makes a difference which profile you pick.
And yes the heating up and then not doing anything is a common issue with the wrong profile in s3d.

Persevere with it as it's hands down the best software around for everything except dual extrusion - for that you'll still need to use makerbot makerware: http://3dprintboard.com/showthread.p...-x86-computers

makwe the most of the download link, when it's gone - it's gone :-) geoff won't let me update it anymore - why ? Ask him lol