Doesn't work with FS DMXT :(

[marinsound]

I'm sorry for my english 3:)
I didn't found here any answer about my problem . So - I have some classic lighting equippement - movings , LEDs , PAR cans and fog . If I had tryed Freestyler DMX , was everything ok and everything was running . But : if I connect my DVC2 GOLD with Elation Optobranch4 (signal splitter) , here I see one base difference between Freestyler and DVC2- the LEDs , indicating DMX signal , which normal blinking fast as on other else DMX lighting equippement , doesn't blink , but lights noninterruptionaly . And my fog mashine American DJ FogStorm 1700HD , controlled by FS DMXT interface doesn't work . Else other equippement work good and everything is ok .
Met anyone simillar problems with American DJ or else products connected to DVC2 ?

please help
thanks a lot

Michal