[Orgmode] Spreadsheet field referencing problem

[Tassilo Horn]

Hi all,

I have a table like this:

| Datum            | Anzahlung | Sonderzahlung | Monatsrate | Restbetrag |
|------------------+-----------+---------------+------------+------------|
|                  |           |               |            |      79000 |
|------------------+-----------+---------------+------------+------------|
| <2009-10-30 Fri> |      7000 |             0 |          0 |            |
| <2009-11-15 Sun> |         0 |             0 |       1000 |            |
| <2009-12-15 Tue> |         0 |             0 |       1000 |            |

In the last column "Restbetrag" I want to have a column formula, so that
I get these values:

| Datum            | Anzahlung | Sonderzahlung | Monatsrate | Restbetrag |
|------------------+-----------+---------------+------------+------------|
|                  |           |               |            |      79000 |
|------------------+-----------+---------------+------------+------------|
| <2009-10-30 Fri> |      7000 |             0 |          0 |      72000 |
| <2009-11-15 Sun> |         0 |             0 |       1000 |      71000 |
| <2009-12-15 Tue> |         0 |             0 |       1000 |      70000 |

So the formula should take the value from the cell above, and substract
the sum of the other values in that row.  So I came up with the formula

     #+TBLFM: address@hidden - vsum($2..$4)

but recalculating the table gives that:

| Datum            | Anzahlung | Sonderzahlung | Monatsrate | Restbetrag        
 |
|------------------+-----------+---------------+------------+--------------------|
|                  |           |               |            | Restbetrag        
 |
|------------------+-----------+---------------+------------+--------------------|
| <2009-10-30 Fri> |      7000 |             0 |          0 | Restbetrag - 7000 
 |
| <2009-11-15 Sun> |         0 |             0 |       1000 | Restbetrag - 8000 
 |
| <2009-12-15 Tue> |         0 |             0 |       1000 | Restbetrag - 9000 
 |

How do I get it right?

Bye,
Tassilo