Inventory filter does not work

[VAVA33]

Hi,

Infos: VM 2.0.22a + Joomla 2.5.14

When I want to use the filter in inventory menu  -> Virtuemart -> Products -> Inventory, the filter product field does not work ....
If I type a word and if I click on GO button, nothing happens....

Does anyone help me ?

Many thanks.