i installed the mylyn-mantis-3.9.0,mantisbt-1.2.11 and myly 3.8, and then add respository in eclipse,
type "http://127.0.0.1:8887/mantisbt/api/soap/mantisconnect.php" into server input text,and type the userid,password,the click "validate settins" button,eclipse prompt following errors:
The repository has returned an unknow error,Most likely there is an error in the repository configuration:

Reason:
Error Type:SYSTEM NOTICE,
Error Description: Array to string conversion

Apache Server Error logs:
[Tue Jan 29 00:18:09.890625 2013] [:error] [pid 8136:tid 1112] [client 127.0.0.1:1363] [mantisconnect.php] Error Type: SYSTEM NOTICE,\nError Description: Array to string conversion\nStack Trace:\nnusoap.php L6132 mc_error_handler Params: (<string>'8', <string>'\'Array to string conversion\'', <string>'\'C:\\\\Program Files\\\\EasyPHP-12.1\\\\www\\\\mantisbt\\\\library\\\\nusoap\\\\nusoap.php\'', <string>'6132', <string>'array (\'name\' => \'return\', \'type\' => \'tns:ProjectDataArray\', \'value\' => array (0 => array (...)), \'use\' => \'encoded\', \'encodingStyle\' => FALSE, \'unqualified\' => FALSE, \'forceType\' => FALSE, \'v\' => array (\'id\' => 1, \'name\' => \'test\', \'status\' => array (...), \'enabled\' => \'1\', \'view_state\' => array (...), \'access_min\' => array (...), \'file_path\' => \'\', \'description\' => \'test\', \'subprojects\' => array (...)), \'xml\' => \'\', \'uqType\' => \'ProjectDataArray\', \'ns\' => \'http://futureware.biz/mantisconnect\', \'elementNS\' => \'\', \'contents\' => \'\', \'k\' => 0, \'typeDef\' => array (\'name\' => \'ProjectDataArray\', \'typeClass\' => \'complexType\', \'phpType\' => \'array\', \'compositor\' => \'\', \'restrictionBase\' => \'http://schemas.xmlsoap.org/soap/encoding/:Array\', \'elements\' => array (...), \'attrs\' => array (...), \'arrayType\' => \'http://futureware.biz/mantisconnect:ProjectData\'), \'phpType\' => \'array\', \'cols\' => \'\', \'rows\' => 1)')\nnusoap.php L5763 serializeType Params: (<string>'\'return\'', <string>'\'tns:ProjectDataArray\'', <string>'array (0 => array (\'id\' => 1, \'name\' => \'test\', \'status\' => array (...), \'enabled\' => \'1\', \'view_state\' => array (...), \'access_min\' => array (...), \'file_path\' => \'\', \'description\' => \'test\', \'subprojects\' => array (...)))', <string>'\'encoded\'', <string>'FALSE', <string>'')\nnusoap.php L4133 serializeRPCParameters Params: (<string>'\'mc_projects_get_user_accessible\'', <string>'\'output\'', <string>'array (0 => array (0 => array (...)))', <string>'')\nnusoap.php L3721 serialize_return()\nmantisconnect.php L1717 service Params: (<string>'\'<?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><ns1:mc_projects_get_user_accessible soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://futureware.biz/mantisconnect"><username xsi:type="xsd:string">jian.gong</username><password xsi:type="xsd:string">111111</password></ns1:mc_projects_get_user_access...\'')\nmantisconnect.php L0 {main}()\n