Problem with Free Text Box

HI All,
am working with asp.net 2.0 and c#
in my application i user FreeTextBox 3.1.6 Editor.
in my local system it works fine.But when i uploaded the application to the server
it giving the error
the error is :
======================================
Server Error in '/client' Application. Invalid ToolbarLayout -> System.Security.VerificationException: Operation could destabilize the runtime.
  at FreeTextBoxControls.ToolbarGenerator.ToolbarItemFromString(String StringName)
  at FreeTextBoxControls.ToolbarGenerator.ToolbarsFromString(String toolbarLayout) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where i ...