WEBAPI 凭证新增

1.我要对贷方科目1012增加 部门“BM000007” 核算项目，语句如下，怎么保存在t_gl_voucherentry.FDETAILID一直是1，我在cloud系统输入凭证就是正确的。请问我写的哪里有问题吗？

{
"Creator": "ch",
"NeedUpDateFields": [],
"Model": {
"FVOUCHERID": 0,
"FAccountBookID": {
"FNumber": "006"
},
"FDate": "2014-8-8",
"FYEAR": "2014",
"FPERIOD": "8",
"FBILLNO": "313",
"FVOUCHERGROUPID": {
"FNumber": "PRE001"
},
"FVOUCHERGROUPNO": "313",
"FATTACHMENTS": "0",
"FBASECURRENCYID": {
"FNumber": "PRE001"
},
"FDEBITTOTAL": "100.00",
"FCREDITTOTAL": "100.00",
"FCreatorId": {
"FUserAccount": "100007"
},
"FCreateDate": "2016/6/22 21:06:19",
"FDocumentStatus": "A",
"FACCTORGID": {
"FNumber": "101.2"
},
"FEntity": [
{
"FEXPLANATION": "Test",
"FACCOUNTID": {
"FNumber": "1001"
},
"FAMOUNTFOR": "100.00",
"FAMOUNT": "100.00",
"FCURRENCYID": {
"FNumber": "PRE001"
},
"FEXCHANGERATETYPE": {
"FNumber": "HLTX01_SYS"
},
"FEXCHANGERATE": "1.00000",
"FDC": "1",
"FDEBIT": "100.00",
"FCREDIT": "0.00",
"fentryseq": "1"
},
{
"FEXPLANATION": "Test",
"FACCOUNTID": {
"FNumber": "1012"
},
"FDetailID": {
"FDetailID__FFLEX5": {
"FNumber": "BM000007"
}
},
"FAMOUNTFOR": "100.00",
"FAMOUNT": "100.00",
"FCURREFNCYID": {
"FNumber": "PRE001"
},
"FEXCHANGERATETYPE": {
"FNumber": "HLTX01_SYS"
},
"FEXCHANGERATE": "1.00000",
"FDC": "-1",
"FDEBIT": "0.00",
"FCREDIT": "100.00",
"fentryseq": "2"
}
]
}
}