issue with readVCF

[cyadrogarcia]

when trying to run line 13 of the script I am getting the following error

genome = readVCF("ALL.chr2.phase3_shapeit2_mvncall_integrated_v5a.20130502.genotypes.vcf.gz", 1000, "2", 1, 240000000,samplenames=c(CEU,CHB,YRI), include.unknown=TRUE)

Caught exception inside whop_tabix::open('ALL.chr2.phase3_shapeit2_mvncall_integrated_v5a.20130502.genotypes.vcf.gz'):
'whop_tabix::open : index load failed!'
return FALSE from whoptabix_open
vcff::open : could not open tabix-index!
VCF_open : Could not open file 'ALL.chr2.phase3_shapeit2_mvncall_integrated_v5a.20130502.genotypes.vcf.gz' as tabix-indexed!

I have downloaded the file and located in the working directory
Any idea why is this problem happenning?
Thanks