Rb1100ahx2 interface being switched up and down frequently

HI
I have a link between a groove 52hpn and rb1100ahx2.It seemed link is connected and there is no problem.but rb1100 's logs show that the interface that is connected to 52hpn be repeatedly switched up and down.52hpn 's log shows this case.
I also try my other ports rb1100 but all the ports were switched up and down.I have replaced rb100 with a rb750 and i see there is no problem.I have auto negotiate options in both got disabled and both interfaces on the 100m was set but the problem is still not solved.