Wrong format .ped in PLINK
So, columns 7 and 8 should be the genotype of variant 1 (each column is one of the alleles). You have them as 0 1, which means absent and major allele.

I think you're just missing a column. From the doc:

Column 6 is Phenotype value ('1' = control, '2' = case, '-9'/'0'/non-numeric = missing data if case/control)

Ideally you would know which SNPs are heterozygous based on your SNP calling and have such SNPs as 1 2, but if you have a homozygous organism or if you're working with data that's been flattened you can simply generate the .ped file with the same number twice for each SNP.