[SR-Users] failed to find command http_async_query - Even though module loaded

Hi guys, I am using the http_async_client module to POST some requests to a Web Interface, and on server 1 it all works well. I have done a fresh install from github, version 4.4 on Centos 6.8 on server 2, and kamailio wont start. Its the same configuration file, however it states; failed to find command http_async_query (params 3) However the module is loaded, and when installing no errors were written when creating the module, and in terms of its links they are below and look ok to me. Is there anywhere else I should be looking? Thanks Jon ldd http_async_client.so linux-vdso.so.1 => (0x00007ffecedf1000) libcurl.so.4 => /usr/lib64/libcurl.so.4 (0x00007fdc5bd63000) libevent-2.0.so.5 => /usr/lib64/libevent-2.0.so.5 (0x00007fdc5bb1c000) libsrutils.so.1 => /usr/local/kamailio-4.4/lib64/kamailio/libsrutils.so.1 (0x00007fdc5b90c000) libkcore.so.1 => /usr/local/kamailio-4.4/lib64/kamailio/libkcore.so.1 (0x00007fdc5b6ff000) libc.so.6 => /lib64/libc.so.6 (0x00007fdc5b36a000) libidn.so.11 => /lib64/libidn.so.11 (0x00007fdc5b138000) libldap-2.4.so.2 => /lib64/libldap-2.4.so.2 (0x00007fdc5aee7000) librt.so.1 => /lib64/librt.so.1 (0x00007fdc5acde000) libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x00007fdc5aa9a000) libkrb5.so.3 => /lib64/libkrb5.so.3 (0x00007fdc5a7b3000) libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x00007fdc5a586000) libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00007fdc5a382000) libz.so.1 => /lib64/libz.so.1 (0x00007fdc5a16c000) libssl3.so => /usr/lib64/libssl3.so (0x00007fdc59f28000) libsmime3.so => /usr/lib64/libsmime3.so (0x00007fdc59cfb000) libnss3.so => /usr/lib64/libnss3.so (0x00007fdc599bb000) libnssutil3.so => /usr/lib64/libnssutil3.so (0x00007fdc5978e000) libplds4.so => /lib64/libplds4.so (0x00007fdc5958a000) libplc4.so => /lib64/libplc4.so (0x00007fdc59385000) libnspr4.so => /lib64/libnspr4.so (0x00007fdc59146000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fdc58f29000) libdl.so.2 => /lib64/libdl.so.2 (0x00007fdc58d25000) libssh2.so.1 => /usr/lib64/libssh2.so.1 (0x00007fdc58afc000) libm.so.6 => /lib64/libm.so.6 (0x00007fdc58878000) /lib64/ld-linux-x86-64.so.2 (0x00007fdc5c1f8000) liblber-2.4.so.2 => /lib64/liblber-2.4.so.2 (0x00007fdc58668000) libresolv.so.2 => /lib64/libresolv.so.2 (0x00007fdc5844e000) libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00007fdc58234000) libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x00007fdc58028000) libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00007fdc57e25000) libssl.so.10 => /usr/lib64/libssl.so.10 (0x00007fdc57bb8000) libcrypto.so.10 => /usr/lib64/libcrypto.so.10 (0x00007fdc577d4000) libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007fdc5759d000) libselinux.so.1 => /lib64/libselinux.so.1 (0x00007fdc5737d000) libfreebl3.so => /lib64/libfreebl3.so (0x00007fdc5717a000)