Input query creation not possible

Hi experts,

I need to create an input query with at least one input ready caracteristic. I created the write access cube, and the aggregation level with RSPLAN, but when i create a new query based on this infoprovider i always have the planning tab 'Start query in change mode' in gray.

Is there any extra parameters needed in order to create the input query ?

could it be a server customizing problem ?

regards

Raed