Facing Addressing problem in S7-315-2Dp

Hello,

I am using S7315-2DP CPU , The hard ware configuration is 2 No of 32 Digital Input Module,3 No of Digital Output Module and 2 No. of4 channel Analog output module.

During configuration of output module , the system selects address from "Q8 to Q11", when i change the address to "Q0 to Q3" by unchecking the system selection check box. I face problem in the functioning of the program.

For ex.IF i use the adress selected by the system the particular output say (Q8.0) works normally when i switch on and off this output thru a input.whereas if i configure the address from (Q0.0) then output does not works normally,(i.e) it does not goes OFF even if the input is not there.