(ask) why like this ????

dear mikrotikers…
we have a rb600 with nstreme mode active , if we are not in Nstreme mode this RB stable and always connect between AP and Station (but with poor link connection its just about 1Mbps),when we use Nstreme mode this connection between AP and station always connect disconnect connection (with this mode we have more good link its about 2Mbps) why our RB like this ? our spec conn and RB like this below :

AP side Station Side
Device : Rb 532 >< RB 600
R OS : 3.9 >< 3.9
Power : 48V with Poe>< 48V without PoE
Card : CM9 >< CM9

This connection establish in wireless 2,4 crowded area (about more than 100 ssid i can see if i “scan” with 24 Ghz), its about 40 km’s (sory we use km) distance between AP and Station.

We have another radio and connection with Nstreme, in one side (AP side) but this radio device work very good (4Mbps conn BW test, and no connect disconnect).

Help me pls !

From the information, it appears you have interference from co-channel users, or a high noise floor, or a poor signal to noise ratio on the link.