SVAR irf form

[Yunjeong Kwon]

I analyzed SVAR using my data and irf graph looks something wrong.
Is there any problem with my commands?

matrix A1 = [1,0,0,0,0\.,1,0,0,0\.,.,1,0,0\.,.,.,1,0\.,.,.,.,1]
matrix B1 = [.,0,0,0,0\0,.,0,0,0\0,0,.,0,0\0,0,0,.,0\0,0,0,0,.]

svar NetExportsofGDP lnToT lnRLh lnRLrealcons lnrealMW , lags(1/6) aeq(A1) beq(B1)
matlist e(A)
matlist e(B)
irf create order1, set(var1.irf) replace step(20)
irf graph sirf, xlabel(0(4)20) irf(order1) yline(0,lcolor(black))