System.ArgumentException: An entry with the same key already exists.

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exceptions

The following error keeps on disconnecting my software from my server...
(A dialog box pops up with this continuously until I close the software)

S - FMTT2

System.ArgumentException: An entry with the same key already exists.
at System.Collections.Specialized.ListDictionary.Add(Object key, Object value)
at System.Collections.Specialized.HybridDictionary.Add(Object key, Object value)
at Khendys.Controls.ExRichTextBox..ctor()
at Instant_Messaging.InstantMessaging.InitializeComponent()
at Instant_Messaging.InstantMessaging..ctor()
at SalonwareNET.frmInstantMessaging.InitializeComponent()
at SalonwareNET.frmInstantMessaging..ctor()
at SalonwareNET.frmMain.Timer1_Tick(Object sender, EventArgs e)



It also pops up when I try to use the Instant Messaging feature in the software.


By the looks of it, I have duplicate keys somewhere and it doesn't know which one to choose. But I have no coding experience.


What am I looking for and how I would I go about finding it?



Thank you in advance and apologize if it's a simple fix.


BG