EX2000: IOS Drop Number Set

I changed the IOS Main Control Card (DS200DMCBG1A) in the EX2000 of one of our Gas Turbines. I downloaded the corresponding software but with the drop number (address) of other unit that is running. The IOS display is showing the running unit information. I need to change the drop number to avoid conflict with the other units through the arcnet. I tried to update it with a software tool but without good results.

Thanks in advance for any help.