can't halt cpu?

i was debugging a board of a fa526 core cpu with insight and openocd, interface is jlink v7

it’s ok before the gdb tried to connect with openocd, then below errors happens.

Error: invalid mode value encountered 0

Error: cpsr contains invalid mode value - communication failure

it seems that openocd can’t halt the cpu to stay in debug mode, when i use halt command, same errors happen

any comment appreciated。