Roundcube won't send long messages (only short ones)

[billywind]

I am using Roundcube latest version on Windows, with hmail server.

When I reply to a message from someone that is longer than just a few lines (eg 10-15), roundcube doesn't send the message, it just says "Sending Message" in the bottom right for about a minute and then that disappears and the message doesn't send.

When I reply or compose a very short message it sends fine - its only longer messages that don't send.

Anyway know why this might be?

[tonytv]

Hi, I changed too php.ini, restart apache2, but with no success until restart the server. After restart the server in window appears the new value I defined.