Metadata Integration Server: Test of CentraSite connection failed.

I set the parameters in Metadata Section in Integration Server (version 9.9 with all fix)
I try to test connection and I have this error:
Test of CentraSite connection failed.

IS Identifier host
CentraSite URL http://host:53305/CentraSite/CentraSite
User Name Administrator
Password ********

The User and Password are the same that I use to logon in CentraSite.
Do you have any idea?
Thanks in advance.

Hi found this error on log of CentraSite:

[com.softwareag.centrasite.server.CentraSiteServerImpl] 2016-09-16 14:37:22,671 INFO : REQUEST: POST (HTTP/1.1), URL https://host:53313/CentraSite/CentraSite/
[com.softwareag.centrasite.server.CentraSiteServerImpl] 2016-09-16 14:37:22,674 ERROR: authenticateUser(): Administrator Login failed. Either userId or password does not exist INTERNAL\Administrator