sending 2nd suspicious file

having successfully sent to Comodo the first file it found to be suspicious I find the firewall does not respond to allow me to send a second file. What am I doing to prevent it working? I closed the window and re-opened it, to no avail.

I know some about this topic I have sent a few myself for one is the file large ? And second are you on a slow connection ? Like say dial up or one not much faster then that ?