Cvs-head start problems

hi, i have downloaded asterisk cvs-head version, but i got this error, when i try to start asterisk:

[]May 17 21:55:52 WARNING[26015]: loader.c:306 __load_resource: /usr/lib/asterisk/modules/ undefined symbol: ast_pthread_create
May 17 21:55:52 WARNING[26015]: loader.c:514 load_modules: Loading module failed!
Ouch … error while writing audio data: : Broken pipe

anyone an idea ?

Clear out all the Asterisk modules and recompile



My step is as follows:
get back into the compiled source directory

mv /usr/lib/asterisk/modules/ /usr/lib/asterisk/modules2/

make install