streamline on map projection "LambertConformal"

Hi
There are two variable u(y,x) and v(y,x),and i will plot streamline with projection "LambertConformal".

the ncl scripts are :

begin
   
      f = addfile(filepath,"r")
      u = f->u850
      v = f->v850
      wks = gsn_open_wks("ps",outputfile)
      res = True
      res_at_mpProjection = "LambertConformal"
      res_at_tfDoNDCOverlay = True
      res_at_mpLimitMode = "Corners"
      res_at_mpLeftCornerLatF = f_at_lat00
      res_at_mpLeftCornerLonF = f_at_lon00
      res_at_mpRightCornerLatF = f_at_latNxNy
      res_at_mpRightCornerLonF = f_at_lonNxNy
      res_at_mpLambertParallel1F = f_at_centralLat
      res_at_mpLambertParallel2F = f_at_rotation
      res_at_mpLambertMeridianF = f_at_centralLon
      res_at_pmTickMarkDisplayMode = "Always"

      res_at_stLineColor = "orange"
      plot = gsn_csm_streamline_map(wks,u,v,res)

end

i got the attach file "st.gif" with the problem on x-axis and y-axis labels.

thanks for help

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