tms320f28377d SPIB not generating any signals in master mode and not receiving any signals in slave mode

Hi

we are using tms320f28377d development board. we are checking spi communication on every modules(SPIA,SPIB,***). we configured SPIA as master with 5 MHz clock and 16 bit data length and we configured SPIB as slave. then we checked SPI communication between SPIA and SPIB we are unble to get any receive interrupt in SPIB while all the generated signals from SPIA is coming fine. Then we thought that there is some problem in configuration but when we tried with SPIB as master and SPIA as slave we are unable to get the signals from master(SPIB). All signals are simply getting high. please support us to solve this problem.

Thanks