Queue Ringall strategy is not ringing all extensions

Hello,

Queue Ringall strategy is not ringing all the extensions at the same time. It rings randomly one extensions and after 2 -3 seconds it is rings other extensions… Please help…

Here is my processor info:Intel Pentium Dual-Core E6500 Wolfdale 2.93GHz 2MB L2 Cache LGA 775 65W Dual-Core Processor BX80571E6500

It is working fine on different machine…

Please run this command from a shell prompt on the same server as Asterisk:
asterisk -rx "queue show " and paste the results