OPC DA Write value Word to Kepserver |Classic OPC: DA, A&E, HDA, XML-DA, etc.|Forum|OPC Foundation

Hey 

Am using opc da to communicate with KepserverEx v6 , i can read all the items that i assigned with no problem 

but i could not write to kepserver , i just try to do the same thing but with matrikon opc simulation its work so i dont think is the problem in my code , so what i miss in kepserver side ?

i just check all the parameter from kepserver side like ( Access system tag and it by default checked to Allow ) , the tag that i used in the kepserver side apel to read and write ( not read only ) .