Custom tooltip on RefId field in ReqTransExplosion form

Hi,

I have to develop custom tooltip on RefId field in ReqTransExplosion form. Unfortunately overriding of toolTipField and toolTipRecord on ReqTrans table does not work. I always see standard informations on tooltip there: plan version recid and reference id. I can't use tooltip method on data source field, because i need to put some record specific informations there. How can i achieve this? And why there are so strange informations, despite the Title1 and Title2 properties on ReqTrans point to other fields?

Thanks,

T