I have a date column, with the following definition:

{name:'ProjectStatusDate', width:90, align:'center', sorttype:'date', datefmt:'m/d/Y', formatter:'date'},

In the afterInsertRow event, I add the following code:

$("#tblActiveProjects").setCell(rowid,'ProjectStatusDate',"<a href='Reports/RPT_Dashboard.asp?ReportProjectID= " + rowid + "' target=_new title='Progress Updates on this project is outdated! Click to open the latest Project Dashboard'>" + $("#tblActiveProjects").getCell(rowid,4) + "</a>","gridOverdue");

Now, the date sorting is not working. I'm getting "NaN undefined NaN" in some of the date cells.

Any ideas?

Thanks!