[Freeswitch-users] Is FIFO in memeroy or in DB?

I hava two freeswitches ,these freeswitches share the same mysql, I make extension1 which stands Member join the fifo named 111 of FS1 to waiting for a Caller. Then a comming caller from FS2 hits the diaplan that matches fifo 111, I hope extension1 will answer the comming caller,However not. why?Is the data about FIFO in Memeroy,So FS2 can not get the extension1 status from the memory fron FS2. Please help me,Thanks a lot Keep in mind Quality First