500 error from timeout

Hi there,

I'm new here, so forgive me if it's not the right place to post my question.

I'm using Nginx, and I've got a timeout error when making an upload with a php archive application (Ica-AtoM). The server seems to time out after 10 seconds and I don't know how to increase this value, which, in pratice, limits the size of my uploads. I've set php.ini file upload limits to adequate values and tested it, so I think that's not the problem

Here's the log:
[Fri May 15 16:07:10.640184 2015] [fcgid:warn] [pid 35611] [client 158.162.19.245:55390] mod_fcgid: stderr: Operation timed out after 9995 milliseconds with 6094589 out of 41795344 bytes received, referer: http://portal.cehr.ft.lisboa.ucp.pt/arquivos/index.php/certificado-de-crisma/addDigitalObject

And here's what I added to nginx.conf, hoping to solve the timeout issue

fastcgi_buffers 8 16k;
fastcgi_buffer_size 32k;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
proxy_connect_timeout 300;
proxy_send_timeout 300;
proxy_read_timeout 300;
send_timeout 300;

It didn't work, though, and I'm all out of ideas.

Best regards,
Paulo Alves