Communication not working

Dear friends 

i am use window 7 ultimate 64 bit

i am install new window 

driver all install 

 my problem i am install pcs7 v9.0 sp1

simatic manager  is connected with plc correct 

but my issue is 

i am use make program in other computer program is run three year ago but i want one pc for stand by communication error 

when open wincc program is open but not work communication 

i am cp adress corrrect 

pc-pg inter face is correct tcp ip 

simatic is connected why winn error 

all 

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Split from PLC CONNECTION ERROR.