[Vcftools-help] Configuation error

[Cesare S. <ces...@ic...>]

When I try to run configure.ac in the terminal by following the instrunctions on your download page it give me this error:
./configure.ac: line 4: syntax error near unexpected token `[2.63]'
./configure.ac: line 4: `AC_PREREQ([2.63])’
How could this be fixed?

Thank for your help

Cesare Saltini MD., 
Research Professor
Division of Pulmonary and CC  Medicine
Department of Medicine 
University of Florida College of Medicine
1600 SW Archer Rd 
Room M-455
Gainesville, FL 32610
Phone,  352 6279224
Mail,  Ces...@me...
Mail2, ces...@ic...