问题出在: 
    glb.ConnectionString= "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False; Password=Psd;Data Source=filename.mdb 
    不能用Password的形式定义数据库密码,应该改成: 
    Provider=Microsoft.Jet.OLEDB.4.0;Data Source=filename.mdb ;Persist Security Info=False;Jet OLEDB:Database Password=Psd 
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