Ghost 15 installation error message. Please help

I downloaded the 30 day trial version of Ghost 15 and during the installation on Vista a message said:

"File 'C:\Program Files (x86)\Norton Ghost\Agent\SpnRegister.dll' can not be found. Make sure the files is on target system or installed already. "

 

I pressed OK which was the only option. The installation contined and finished and when I checked at the location the file SpnRegister.dll was there. Was this message normal? Is there anything to worry about?