fred-pyfred

hello sir I have finished to install FRED but fred-pyfred server don't start . when I do fred-server status I have  :                                                fred-pyfred is stopped                                                fred-rifd is running                                                fred-pifd is running                                                fred-adifd is running And when I do fred-pyfred start it send back :                                               Traceback (most recent call last):                                               File "./root/bin/fred-pyfred", line 13, in <module>                                                         import pgdb                                               ImportError: No module named pgdb  Have you a solution for this ?                                thank you