configuration error - access is denied

[buran]

Dear ASP.NET Programmers,

I encountered the following problem:

Configuration Error
Description: An error occurred during the processing of a configuration file
required to service this request. Please review the specific error details
below and modify your configuration file appropriately.

Parser Error Message: Access is denied: 'ExportTechnologies.WebControls.RTE'

This component was working for months without any problem. I searched the
net for the solution, but suggested solutions did not help me. I don't use
the Indexing Service. I hope I can fing help here. Thanks in advance,

Burak