Hi all, I was complied the 1.2 version, it's working fine on PC, but when I compile it on windows mobile 6, I encounter a "Datatype misalignmen" ecxeption when called the ： srtpProtect((void*)buffer, (int*)&bufferSize, true); the debugger of MS VS 2005 for mobile is stopped at this line: stream = srtp_get_stream(ctx, hdr->ssrc); The exception is: Unhandled exception at 0x01496778 in Sample.exe: 0x80000002: Datatype misalignment. Please help me how to fix this issue, I'm newbie, thank you in advance.