When installing the SAS PC File server it defaults to using port 8621.
But if you have the SAS Stored Process server installed in SAS 9.2 it also uses port 8621.
So when trying to start the SAS PC File server as a Windows services it won’t start.
To change the port, open the SAS PC File server via the Desktop Start menu Shortcut.
Was about to type this up in full but found a SAS Support note instead 
If running SAS for Windows on the same machine, you can also use Autostart (no need for a service). If you have the 64-bit version of SAS for Windows, you might find that you need PC Files Server to access your “32-bit” data sources (such as Excel and MS Access), because the 32-bit data providers won’t work in a 64-bit process.
The Autostart option requires no configuration, and then you simply have to change your SAS jobs to use DBMS=EXCELCS (for example) instead of DBMS=EXCEL.
More at: http://support.sas.com/documentation/cdl/en/acpcref/63184/HTML/default/viewer.htm#a003353773.htm
Thanks Chris
I just got caught by the old 32 bit ODBC drivers aren’t accessible on a Windows 64 bit SAS server via SAS/Access to ODBC.
An oldy but a goody it seems.