insifient number of observations

[neliswa]

hi guys please help.i get an insufficient number of observations when i run this.iv tried everyone and we all stuck

for %0 oml gfi ang fsr npn rmh agl sab
for !1 =0 to 99
smpl 2001.01+!1 2001.01+!1+35
equation regress1{%0}.ls ret{%0} c retusdzar orthores
beta21{%0}({!1}+1)=regress1{%0}.@coefs(2)
beta31{%0}({!1}+1)=regress1{%0}.@coefs(3)
next !1
next %0

[EViews Gareth]

Do you have enough observations?