Is there a way to increase the Asset Cost using Asset Revaluation for fixed assets? I tried to increase the Cost of the Asset by entering a negative amount in the Write-Down Amount field and clicking Calculate however it didn't do anything? thoughts?

That should do it. I think you just have to hit Calculate which shows the amount that's going to change. But then you also have to hit "process" or "Generate" or whatever the other button on that screen is called.