[2.0] Date Format

[jsc0624]

I don't really understand why this code doesn't work?

dr.BeginEdit();
                dr["ACSDate"] = hdnField.Value;
                dr["FormNum"] = txtFormNumberNew.Text;
                dr["ResponsiblePerson"] = txtResponsiblePersonNew.Text;
                dr["SiteCodeID"] = GlobalVariable.g_sitecodeID;
                dr.EndEdit();

                da.Update(ds, "tblAsset");
                ds.AcceptChanges();

The error says,

Incorrect date value: '5/30/2007 7:07:13 PM' for column 'ACSDate' at row 1

The value of hdnField.Value was taken in this code:

DateTime timeNow = DateTime.Now;
        string myTime = timeNow.ToString("h:mm:ss tt");
        string acsdate = ddlMonth.SelectedValue + "/" + ddlDays.SelectedValue + "/" + ddlYear.SelectedValue + " " + myTime;
        hdnField.Value = acsdate;

What I am using is ASP.net using C# and my database is MySQL AB Database.