Hi all , To implement the g.729 in the pjsip i have followed the steps given in the following link https://trac.pjsip.org/repos/wiki/Nokia_APS_VAS_Direct and i can build the project and created the sis file when i am installing it in the mobile i am getting the error certification error contact the application supplier .. configuration i am using to take the build: carbide c++ 2.0 s60 3rd_MR edition . with out the APS i can install it in the mobile .and i could make a call to the sip accounts any one help me to clear out this problem Regards Ragupathy