question about Unknown call for mod_xmlrpc

When I enabled the mod_xmlrpc, tested with curl, I found the following error:
ejabberd_http:init:153 S: [{[],ejabberd_xmlrpc}]
2015-12-14 00:26:49.496 [info] <0.581.0>@ejabberd_http:init:157 started: {gen_tcp,#Port<0.3980>}
2015-12-14 00:26:49.496 [debug] <0.581.0>@ejabberd_http:process_header:280 (#Port<0.3980>) http query: 'POST' <<"/">>
2015-12-14 00:26:49.496 [debug] <0.581.0>@ejabberd_http:extract_path_query:392 client data: <<"<?xml version=\"1.0\"?> multhisnew FirstNumber 6 SecondNumber 3 ">>
2015-12-14 00:26:49.496 [debug] <0.581.0>@ejabberd_http:process:350 [] matches []
2015-12-14 00:26:49.497 [debug] <0.581.0>@ejabberd_xmlrpc:process:245 got XML-RPC request: {call,multhisnew,[{struct,[{'FirstNumber',6},{'SecondNumber',3}]}]}
2015-12-14 00:26:49.497 [warning] <0.581.0>@ejabberd_xmlrpc:build_fault_response:386 Error -112
Unknown call: {call,multhisnew,
[{struct,[{'FirstNumber',6},{'SecondNumber',3}]}]}

use get_presence command will get the same error

[debug] <0.582.0>@ejabberd_http:init:153 S: [{[],ejabberd_xmlrpc}]
2015-12-14 00:27:41.752 [info] <0.582.0>@ejabberd_http:init:157 started: {gen_tcp,#Port<0.3981>}
2015-12-14 00:27:41.752 [debug] <0.582.0>@ejabberd_http:process_header:280 (#Port<0.3981>) http query: 'POST' <<"/">>
2015-12-14 00:27:41.752 [debug] <0.582.0>@ejabberd_http:extract_path_query:392 client data: <<"<?xml version=\"1.0\"?> get_presence user admin server asdf ">>
2015-12-14 00:27:41.752 [debug] <0.582.0>@ejabberd_http:process:350 [] matches []
2015-12-14 00:27:41.752 [debug] <0.582.0>@ejabberd_xmlrpc:process:245 got XML-RPC request: {call,get_presence,[{struct,[{user,<<"admin">>},{server,<<"asdf">>}]}]}
2015-12-14 00:27:41.753 [warning] <0.582.0>@ejabberd_xmlrpc:build_fault_response:386 Error -112
Unknown call: {call,get_presence,
[{struct,[{user,<<"admin">>},{server,<<"asdf">>}]}]}

Anybody know it? Thanks a lot!