Hi Glocke.
Well that would explain your problem,have you tried pressing the keys shift+1 throught to 9,to see if you get the symbol panel up,as the hose reel panel is a new panel for this aircraft,if this is not the case,and you find that you have to pay for and download the c-130 pro,then you may find that you would have to re install the kc-130 after the c-130 pro,as they have to be installed in that order.
regards alan. 8-)