Error to connect to account on WordPress.com

WordPress version: 3.5.2
JetPack version: 2.3.3

I have just activated JetPack on a new blog, then I followed the link “Connect to WordPress.com” (wp-admin/admin.php?page=jetpack&action=register). It does not connect because after I click on the link the page has this message:

WordPress database error MySQL server has gone away for query UPDATE wp_options SET option_value = ‘a:4:{s:7:\”version\”;s:16:\”2.3.3:1375477654\”;s:11:\”old_version\”;s:16:\”2.3.3:1375477654\”;s:28:\”fallback_no_verify_ssl_certs\”;i:0;s:9:\”time_diff\”;i:0;}’ WHERE option_name = ‘jetpack_options’ made by do_action(‘load-toplevel_page_jetpack’), call_user_func_array, Jetpack->admin_page_load, Jetpack::try_registration, Jetpack::register, Jetpack_Client::_wp_remote_request, Jetpack_Client::set_time_diff, Jetpack::update_option, Jetpack_Options::update_option, update_option

Any ideas on how to fix it?

Thanks!

http://wordpress.org/plugins/jetpack/