KR16 ARC HW

Hello,
i have a KR16 arc HW with KSS 8.3 and a Fronius TPS 3200 power source . i've tried to weld manually by setting the power source inputs to 1 but now my problem is that when i try to weld using arcon the robot doesn't respond and the message "input 6 : power source ready" is shown.
P.S : when i've opened the i/o monitoring window of the robot i can see that the output "power source ready" of the power source is activated!!??????????????
any help please it's urgent!

Can any one help me pleaaasee!!!!