Content-Length Header problem

[franciscol99]

Hello,
I'm using LiteSpeed 4.1.12 and PHP 5.3.10.
When I try to send files greater than 2147483647 bytes (2GB) the download doesn't start.
Removing the header Content-Length the download does start but without file size.

It looks like a 32bits limitation but both programs and the OS (Linux 2.6.38-8-server Ubuntu x86_64) are 64 bits.

Any ideas what may be causing the problem?

Thanks.