Anyone use C1 web grid for asp.net? Problem...

I am using the C1 web grid in asp.net and have a problem that no one answers on their forum. Acutally C1 hardly ever replies to their forum - guess they want you to pay for support instead!

If I have a web grid displaying data and I sort on a column, then choose another column to sort on, how can I reset the sorts to clear them? If I rebind the grid it then shows all of the columns I had selected as sorting with the arrows in the header. I need to clear this in the code somehow.

Thanks!