Well two grids (related) like this

Grid1                 Grid2
Childkey textvalue    Parentkey Textvalue
x1       val1         x2        cval1
x2       val2         x2        cval2
x3       val3

I want to drag&drop cval2 on to x3,val3 row. How do I ? I came to a point where I could do it by getting "current" row dropped on to (I mean grid1.dragdrop fires but not grid1.columns(x).controls(y) which is the reverse of online doc says). It seems that textbox in a grid doesn't support dragmode=Automatic. Am I missing something ? Any suggestion saving my brain cells are wellcomed. TIA.
Cetin