FMS怎么配置映射到网络驱动器？

[雪鹰翔天]

各位大师好。
本人在用FMS4.5做开发，现遇到需要配置网络驱动器的情况：
FMS服务在A服务器，媒体文件在B机器。
根据Adobe相关文档在Application.xml配置了 \\ip\share\ 网络UNC路径映射。
并且FMS服务的启动用户的用户名和密码，设置成与访问B服务器的用户名和密码完全一致。
现在通过unc路径访问B服务器，可以直接访问，不需要输入验证，但FMS服务仍然无法访问B服务器。
请各位大师指点下。
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附 Aobe官方说明：

By default, the server runs as System Account with no access to network drives. You can change the service user to a
user with network access privileges with a UNC path.
A Windows network-mapped drive is not valid when a user is logged out. If the server is running as a service and the
user is logged out, the mapped drive is removed as well. To run with the mapped drive, lock the server instead of
logging out. Using the UNC path is preferred when the server is running as a service.

1 Stop Flash Media Server and Flash Media Administration Server.
2 Make the changes to the configuration.
3 Check that the server user has appropriate access rights to map to the network drive (system account rights are
usually not sufficient.)
4 Restart Flash Media Server and Flash Media Administration Server.