Device's version cannot be upgraded

[okizen]

I have recently upgraded my Galaxy S in Kies from Eclair 2.1 to 2.1 update1. But when I checked in Kies for another firmware upgrade again it said "This device's version cannot be updated.' Is this because no new upgrade is available at present or am I stuck forever on 2.1 update1?

 

[MANdroid5000]

what Galaxy S is it?