Urgent indicator semivariogram problem

I'm trying to create an spatial indicator semivariogram (variables transformed to 0 and 1), but i got the same graph for both. i'm using gslib and i think to have put the right parameters (the 2 thresholds 0, 1), I think it's a matter of concepts (i'm a beginner). I have tried many things, allways with the same result. Can anyone help me? Thanks in advance