Problem with downloading ANNOVAR databases

[Yexzm]

Hi ! I'm trying to download ANNOVAR db using :

./annotate_variation.pl -buildver hg19 -downdb exac03 humandb

and I get :

WARNING: cannot retrieve remote files automatically (by 'wget' command or by standard Net::FTP/LWP::UserAgent Perl module).
Please manually download the following file, uncompress the files to humandb directory, then add a hg19_ prefix to the file names.
http://hgdownload.cse.ucsc.edu/goldenPath/hg19/database/exac03.txt.gz

However, wget, Net::FTP and LWP::UserAgent seem to be installed :

which wget
/usr/bin/wget

And I get documentation when I write "perldoc Net::FTP" or "LWP::UserAgent". Could anyone help me ?

Thanks !!!