myoleobject.application.workbooks(1).save()这一句中有什么不对?是"1"错了吗?

[phong]

我在窗口里插入OLE控件,OLE联接到一个已有的EXCEL表,如下,
integer result
ole_1.activate(inplace!)
oleobject myoleobject
myoleobject=create oleobject
result=myoleobject.connecttoobject("d:\tongji\G2A.XLS")
if result=0 then
myoleobject.application.workbooks(1).save()
end if
destroy myoleobject

[phong]

运行是提示:error calling external object function save at line 7 ...
我打开这个excel文件时则不出现这个告警,可是却不能保存更改.