Webi formula: Create sum with where clause on measure

Hi,

I am trying to create a sum of all values in a table which are greater than a specific threshold. Maybe someone can help me here. I haven't figured whether and how this is possible.

Here is a simple example:

I would like to sum up all values that are greater than 10. So I would have 12 + 25 + 11 = 48.

The formula I tried in WebI was:

=Sum([Measure]) Where ([Measure] >= 10)

The formula is validated with no errors, but the result gives me the grand total ignoring the where clause.

In this example, that would be 12 + 8 + 25 + 3 + 11 = 59.

Any idea, how to achieve a formula like the above?

Thanks and regards,

Stefan