Bind 8.2.2-P5 Mystery - HELP

[Bill Manning]

% domain: hct.ac.ae
% The primary is 194.170.32.5 Running Bind 8.2.2-p5
% The secondary is 194.170.32.11 Running Bind 4.9.4-p1
% 
% The secondary starts the
% transfer but fails when the file size transfered reaches 64K.