HA error

Hi,all:

I have device A and device B to build HA.But It's failed when I add B into the peer list in device B,there is the error message :

Aug 16 00:57:43 MM-QHD-F5-1 err devmgmtd[6994]: 015a0000:3: iControl connection to 1.1.1.2 failed Aug 16 00:57:43 MM-QHD-F5-1 err devmgmtd[6994]: 015a0000:3: iControl connection to 1.1.1.2 failed

But I can add A to B in device B.Can you help me ?? Thanks.