Can't find fireCommand

[RvdGrint]

Hello,

I'm using an GridAttachmentColumn in my RadGrid according example: http://demos.telerik.com/aspnet-ajax/grid/examples/generalfeatures/gridattachmentcolumn/defaultcs.aspx

When click on the AttachmentColumn the error 'Can't find fireCommand' is raised on the following Javascript:

function onclick(event)
{
if(!$find('').fireCommand('DownloadAttachment','{"FileID":5,"ColumnUniqueName":"FileName","FileName":"Hydrangeas.jpg"}')) return false;
}

The problem is caused by $find('') I expect but how do I force that the right object is passend so it will perform like '$find('RadGrid')' ??

Anyone?

[RvdGrint]

The problem was caused by property ClientIDMode="static" on the RadGrid.