>As I reread my thread I found a mistake. The color change applies to the Entire Column not the row. Sorry.

Hard to tell without your code. This is an example that works for me:
thisform.Grid1.Columns(1
).DynamicBackcolor=[iif(left(eval(field(1)),1)="Y",rgb(255,0,0),rgb(128,128,128))]

See if changing column.sparse will help.