Installation Error Always appear

Dear All,

I'm trying to install Exchange Server 2013 in the windows server 2012 (PC2) that already join a domain in another windows server 2012 (PC1) as a DC.

But always it's appear the below error on step 7 of 14:

Error:

The following error was generated when "$error.Clear();

                set-ExchangeServerRole -Identity $RoleFqdnOrName -IsHubTransportServer:$true -DomainController $RoleDomainController" was run: "The domain is invalid. Property Name: Domain".

i have checked if the server has SPN setup correctly as the below steps, and it's looks fine to me without any problem.

a. On the domain controller, open adsiedit

b. Expand to Domain,CD=Computer,

c. Right-click CN=<var>serverName</var>, and then clickProperties.

d. In the Attributes list, click servicePrincipalName, and then clickEdit.

e. Under Values, make sure that it contains the following Value: HOST/ServerNetBiosName

so please i need your help.

Thanks