Report Server (MSSQLSERVER) cannot load the BarCode extension

we could see barcodes in the design mode of reporting services but barcode does not render in report server. what can cause the problem ?

I also attached the config files.

thanx in advance

reporting services error log :

extensionfactory!ReportServer_0-1!12a8!08/06/2010-12:25:20:: e ERROR: Exception caught instantiating BarCode report server extension: System.IO.FileLoadException: Could not load file or assembly 'Microsoft.ReportingServices.ProcessingCore, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
File name: 'Microsoft.ReportingServices.ProcessingCore, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91'

Hi,

Could you please attach the whole log files here for analysis too? Thanks

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

I add all log and config files to the attachment.