Fortigate 240D SFP to 1000T auto negotiate issues?

I have a Fortigate 240D and I installed 2 of FG-TRAN-GC 1000BASE-T SFP Transceiver into the dmz ports. I then connected one to a Dell Power connect 3324 and the other to an HP 2520G. In both cases the FDX / HDX negotiation seemed to fail. This prevented traffic from properly passing. I then hooked both (independently) with a pair of cheap Netgear GS105 dumb switches as middle man and everything works great. I can't see anyway from within Fortigate interface to control negotiation on SFP ports. It seems odd that they work with dumb cheap switches but not more expensive fancy ones. Any ideas?