Current Does not affect to Mooring line

Hello

I am try to calculate mooring line force by b_cat mooring

But changing direction and velocity of  current does not make any difference of output generated by ST_CFORCE 

i entered data like below

&data environment

environment sea10 -sea issc 0 1.0 2.701 -use_mean yes - wind 20 0 -current 2 0

environment sea11 -sea issc 0 1.0 2.701 -use_mean yes - wind 20 30 -current 2 30 

environment sea12 -sea issc 0 1.0 2.701 -use_mean yes - wind 20 30 -current 2 30 

end_&data

but connector force does not change 

please let me know what is wrong and how can i get proper output

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