problem of communication PC and PLC

[COUPA 0]

hi all, I have CPU 315 - 2 DP. I can't download program from S7 manager to CPU. I have message Help on Message 33:17075 Description: All stations on this subnet must have the same value for the transmission rate. The interrupt may not be assigned for other hardware components. The MPI addresses in the network must be unique, meaning each address may only be assigned once. The local Station address must also not be greater than the highest station address in the programmable controller. Remedy: Call the program "Setting the PG/PC Interface" in the Control Panel. Under "Properties" set the transmission rate used in the network and adjust the local node address to match your network. Set a station address for your programming device/PC which is not higher than the highest station address in the network. Shorten your HSA address to match the PROFIBUS addresses of the slaves used. i put all the interface setting PC/PG on default but i've the same message. what i must do ? please some help.