cap rebootloop on switch

Hi

I have a strange problem with my CAPs.

I use 6 cAP with an RB3011 as basestation

The cAP works fine on the POE port of the router and good with any other router port together with the Mikrotik POE adapter.
But as soon as I connect the cAP Caps to an Netgear switch (old model GS724T) together with the same Mikrotik POE adapters the cAPs ending in a reboot-loop.
Software: 6.38.7 on all devices

They register in CAPsMAN and dissappear after 30sec. A few sec later they are back.

Is this a fault of the cAP, the switch or do I something wrong?



Thanks

Chris