Try a repair of avast. Add Remove programs, select 'avast! Anti-Virus,' click the Change/Remove button and scroll down to Repair, click next and follow. This has in the past resolved this out of sync issue between reported and actual VPS version.
Now what VPS version is on your system, right click the avast 'a' icon, select about avast ?
VPS Version: 091227-1 is the latest.