Help me! I can config hardware PLC

My work is monitor andmaintenance auto system. i have a problem when i want to config my PLC hardware again. i can't add or remove a new card in my system, with error "software package missing ... docpro. simotion" . and when i goin hardware config... it have a notify " no changes can be made in this station". Can you show me My Simatic is missed what package, and where i can download that missing package.

thanks you so much.

At first u change your hardware configuration in off node. Then u open your hardware configuration & u delet your first configuring card and then insert your new module.

You tel me what card u insert cpu or sm. Your system simotion &doc prois notrequired.

my simatic is vesion5.4

It is not a version problem...........At first U save as the program another file ...........then u compile the hardware and try...........