How to add tplink wds clients ?? I have many tplink access points connected to my 751u-2hnd when i enable wds on the client side they stop working ?? what do i have to do on my rb751 to made wds work ??

Assuming that tplink's WDS implementation is compatible with MT's implementation, then all you should need to do, is enable WDS on the MT.
Good luck!

改进算法是一个黑客,不是一个标准化的协议。所以,它s implementation varies from vendor to vendor and always incompatible across vendors. If you must use WDS, it is advisable to stick to a single vendor for best performance,

the problem is that the WDS protocol is based on a modified packet header to add the extra MAC address needed, but no one really nailed it down as to exactly how the header was to be modified to add it.So, each manufacturer did it a different way. There are some common ways, because there was only a limited number of different ways of moving the bits around, so often you can strike lucky and find one manufacturer matches another, but there is no guarantee it will work as there is no "standard".