Filter Pane InfoObject Drop Down List only showing 10 values

Hi

We are using the filter pane item in the WAD. In transaction RSD1 we maintain for InfoObjects the business explorer tab as follows:

Filter display = 4 Drop Down Box.

This has the desired result that it list the values of the infoobject on the web within the filter pane item instead of just "show all values" and "edit", the problem is that it only shows 10 - how do I make it show all the values available of an infoobject? I have tried all other infoobject settings and looked at the filter pane properties but cannot find anything, have also looked at help.sap.com to no avail

Thanks any help appreciated