Shipment configurations are not saved.

[django29]

Hi

Suddenly, it's impossible to save any shipment configuration :
Shop/Shipment methods/Shipment name/Configuration.

We try to enter a shipment price for each weight range, but when we save, all the configuration fields are empty.
We use the fields : Country, lowest weight, highest weight, weight unit, and Shipment cost.

What can be the problem ?

[jenkinhill]

http://forum.virtuemart.net/index.php?topic=79799.0