Attachment Download stops at 16,384 kbytes???

[Lynne]

Take a look at these variables:
PHP Settings:
max_execution_time
memory_limit
post_max_size
upload_max_filesize
max_input_time

MySQL Settings:
max_allowed_packet
max_packet_size
wait_timeout

My guess is it is one of those that is effecting your download and you will have to change it in the appropriate conf file for either php or mysql. If you cannot do that, you should talk to your host about the issue.