i have problem to create new account

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Unhandled exception: Cluster host connection failure for SEDRENIK: Connection refused (111) in /usr/local/centovacast/system/class_RPCDaemonClient.php:917

#0 /usr/local/centovacast/system/class_RPCDaemonClient.php(917): RPCDaemonClient::send()
#1 /usr/local/centovacast/system/class_RPCDaemonClient.php(863): RPCDaemonClient->send()
#2 /usr/local/centovacast/system/class_RPCDaemonClient.php(655): RPCDaemonClient->command()
#3 /usr/local/centovacast/system/class_SystemControl.php(1120): RPCDaemonClient->info()
#4 /usr/local/centovacast/system/class_SystemControl.php(315): SystemControl->api_provision()
#5 /usr/local/centovacast/web/class_AccountEditor.php(887): SystemControl->__call('provision', Array)
#6 /usr/local/centovacast/web/class_AccountEditor.php(263): AccountEditor->provision_account()
#7 /usr/local/centovacast/web/reseller/modules/class_Module_accounts_base.php(65): AccountEditor->create()
#8 /usr/local/centovacast/web/admin/modules/class_Module_accounts.php(47): Module_accounts_base->create_account()
#9 /usr/local/centovacast/web/class_WebApplication.php(217): Module_accounts->execute()
#10 /usr/local/centovacast/web/admin/class_AdminApplication.php(64): WebApplication->execute()
#11 /usr/local/centovacast/web/admin/index.php(49): AdminApplication->execute()
#12 {main}
so what i will do

to go test centova 2 or still go with this centova 3

Yes if your a new Centova client you should use v2, it runs very stable and has the most features by far vs others.

See sticky.