Event ItemCommand not firing in DataGrid (1.1)

[Andy]

Probably this quesion was already raised, but I couldn't find any answer to
it, even on Google.

My question is:

I have a plain datagrid on a page, and I'm adding a button column to it.
When this button column is in a form of a Link button, ItemCommand event is
processed, and code stops nicely on a breakpoint set in the
DataGrid1_ItemCommand procedure. When I make one change - type of the button
is changed to Push button, DataGrid1_ItemCommand doesn't work. Why is this
happening? Anybody has answer to it?

I know there's another way with a Template column containing one button --
but same ItemCommand doesn't trap the event.

Can anyone please help and explain how I can trap button clicks of the
buttons located in the Button and Template columns of the DataGrid?

P.S. .NET Framework 1.1

Thanks very much,

Andy.