wincc 7.5 sp1 communication problem with s7-400h

Hello all,

             i am having problem of communication of s7-400h plc with wincc 7.5 sp1 ,

PLC1 -192.168.1.1

PLC2-192.168.1.2

WINCC PC-192.168.1.5

for communication i am using dynamic wizard ,Create redundant connection option in that process,

i have created Two tcip ip connection & i gave main& standby plc IP,so in dynamic wizard in redundant connection i gave main connection & reserve connection.

But problem is communication is not getting with plc.

1)Global script activated.

2)PG/PC Driver also checked