I know it's way too late now, but if the Abs warning was coming on for a long time it will need clearing by a dealer. This is beacuse after the fault registers a certain number of times the warning the ECU perminantly records it and the only way to get rid of it is with the dealer software.
However if the warning hasn't registered too many times and you repair the fault it will clear itself once you drive over 7kph
Dave
January 2011