testing R52H

hello, I have proven new mpci r52h in rb 133c in which mpci was one wlm54ag for my surprise I have not been able to establish connection with new mpci, before the doubt I decided to test another and in a AP where tapeworm one mpci xr2 with some clients replaces r52h on the other and comprobe that the clients which they were connected well now no, I suspect that mpci has some problem, has proven somebody them satisfactorily? Thanks

which version you are using?
what configuration you had?
what does the log files aid?