WorkFlow doesnt run -- "Cannot Connet to the Server XXX"

[ClaireHCM]

Hi,,

I am new to Informatica.I just install informatica in my machine.

Everything else is working fine.But when I trigger "Start WorkFlow", it always prompts me that Cannot Connect to the Server XXX.I think something wrong in my server or repository configuration.

In the Informatica Server Setup configuration, there are Server and Repository configuration pages.

May I know what are the values I should fill in for the following parameters?

--Server--
Server Name:
TCP/IP Host Address

--Repository--
Repository Name:
Repository User:
Repository Password:
Repository Server Host Name:

Say I created 2 Repositories for Oracle and MS SQL, which one I should fill in the --Repository--
configuration page?Or it's something else?
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Another question, How I should configure the Server in WorkFlow Manager?It requires the following parameters:

Server Name:
Host Name/IP Address:

In the Server Variables, I filled the Attribute Value for
$PMRootDir as "E:\Informatica\Informatica PowerCenter 6.2 - Server"
Because under this folder, I saw subfolders: SessionLogs, Badfiles, Cache ,.....
Is this correct?

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Thanks in advance.