"net package" not build

i want to implement manual ethernet setting with application code but except default

setting when i am setting package as "net" under template then i am not able to build the library properlly.

Means under the lib folder only two file are made libextras.a,libtarget.a

these three files are missing -extras.o,target.ld,vectors.o

so i am not able to make the file.

I do not know why? few days before this net package was worked fine with dhcp option,and now the same setting also not working

do you know the reason?i have to set/configure somwhere in the ecos config tool.i am stuck here,

NIrav