Page Error

System.Collections.Generic.KeyNotFoundException: wTransmissionID not found
   at Kidz.DataAdapter.dawTrmChild.ReadBywTransmissionID(Int32 wTransmissionID)
   at Kidz.Business.ACL.Encryption.Token.ProcessToken()
   at Kidz.Business.External.frmRSVP.get_Token()
   at Kidz.Business.External.frmRSVP.ProcessToken()
   at Kidz.Business.External.frmRSVP.OnPreInit(EventArgs e)
   at System.Web.UI.Page.PerformPreInit()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)