Search Help F4 Value List not appearing

Hi All,

I have changed elementary search help to include the MTART field for Material Type.

When I test my changes after activation, the value list button doesn't appear, and even if I push the F4 key I am not given the value list.

I have done this for other elementary search helps for the same field, with the exact same data element and domain (MTART), and when I test I do see a dropdown on the field.

I have tried everything and done a comparison between the two search helps and cannot see any differences, I cannot understand why the dropdown doesnt appear. Anyone know what the problem could be?

I have also looked for SAP OSS Notes but could not find anything that is not already implemented or not relevant.

Shaun.