Item Master Data shakes or refresh with two add ons

Hi guys,

I have a problem we have a WMS add-on and a customized UDFs organizer add-on, every time a new Item Master Data window is opened it starts to shake or refreshing like 5 seconds. When the WMS add-on works alone IMD is opened normally as well as when the UDFs addon is working alone, the problem is when both add-ons are running, this is a piece of loading code:

Private Sub SBO_Application_ItemEvent(ByVal FormUID As String, ByRef pVal As SAPbouiCOM.ItemEvent, ByRef BubbleEvent As Boolean) Handles SBO_Application.ItemEvent

        If (pVal.FormType = 150 And pVal.EventType = SAPbouiCOM.BoEventTypes.et_FORM_LOAD And pVal.Before_Action = True) Then

            oItemForm = SBO_Application.Forms.GetFormByTypeAndCount(pVal.FormType, pVal.FormTypeCount)

            oNewItem = oItemForm.Items.Add("UDFs", SAPbouiCOM.BoFormItemTypes.it_FOLDER)

            oItem = oItemForm.Items.Item("4")

            oItem.Left = 380

            oItem.Top = 90

            oItem.Width = 150

            oItem.Height = 350

            oFolderItem = oNewItem.Specific

            oFolderItem.Caption = "UDFs"           

            oFolderItem.GroupWith("3")

            AddItemsToItemForm()

This only happens when the add on is installed, when the UDF add-on is running in debbuging mode everything is fine even running both add-ons.

Any help would be appreciated.

Thank you all.