I have limited VB Script experience, but have been working on the script below and keep getting errors, the most common being "expected identifier". 

Can someone tell me what I'm missing here?

```
Dim class as Integer
if [AGE_DATABA] >= 200 AND [Riparian_S] <> 1 then
class = 5
elseif [AGE_DATABA] > 200 AND [Riparian_S] = 1 then
class = 2
else
class = 0
End if

```

expression = class