Flash Panel times out

in 2.5.0 the flash panel keeps timing out on me

ps aux | grep panel shows it running

root 4819 0.0 0.0 1772 500 ? S 18:08 0:00 sh /var/www/panel/safe_opserver
root 4820 0.0 1.5 9652 8024 ? S 18:08 0:01 /usr/bin/perl /var/www/panel/op_server.pl

but it always times out

any ideas would be welcome

thank you