I might be wrong on this, but I don't think there's any difference in the installers (please, someone correct me if I'm wrong). The license key is what does the trick. So they must have used the wrong license key.
That's even more strange as I don't know how they would have got hold of a 'FLT' code as the code is linked to the company name....
Here's a crazy idea: Ask them.
I emailed my 'local' FM contact and am still waiting to hear back. I was hoping they read these posts ...:-)