[Serusers] SEMS+ IVR

I am using SER (last version from CVS ) +SEMS (last version from cvs) with IVR functionality. Python version 2.3 Error : ---------- record message Traceback (most recent call last): File "/usr/local/etc/ivr/ivr.py", line 65, in ? if os.path.isdir(messages_path + callee) != True: TypeError: cannot concatenate 'str' and 'NoneType' objects (20842) ERROR: run (IvrPython.cpp:968): IVR PYTHON Error: Failed to run "/usr/local/etc/ivr/ivr.py" (20842) DEBUG: run (IvrPython.cpp:1008): IVR: run finished. stopping rtp stream... ------------------------------------------------------------------- and becouse i dont have any fogest idea about python i am not sure what to do and come here to ask for help 10x in advance PS: sry about my bad english