Multiple controls with the same ID 'x' were found. FindControl

Hey Guys,

Getting the following error

Multiple controls with the same ID 'ltlItemCode' were found. FindControl requires that controls have unique IDs.
This Error does not happen on page loads but when I change the value of a drop down which has
AutoPostBack="true".

Code is

  //Number of Services
numberofServices = Int32.Parse(DCCFunctions.GetNumServicesPerRoom(roomId.ToString()));
additionalServices = new UserControls_AdditionalService[numberofServices - 1];

String htmlTable = String.Empty;
Int32 cell = 1;
Int32 rows = numberofServices;
Int32 cols = 4;


TableHeaderRow h = Go to the complete details ...