I input wrong password for U2000 consecutively for 3 times.so,client locked and message showing that I can unlock only after 30 min.
to unlock is very simple process.
1.Go to U2000 installation directory.
2.Then follow this C:\U2000\server\bin.
3.Inside Bin folder double click " svc_releaseUser.exe"
4.It will ask :"Please input user name:"
5.Input locked user name ,in my case it was "admin" and press enter.
6.message will come :"success"
7.Now login client ,you will login successfully within 10 seconds.
This method can be use frequently by Huawei Engineer.Tell customer not to do it frequently because any user can do it.