Hi,
I've been working on creating custom reports for a CRM 2011 instance using Business Intelligence Development Studio.
When I try to preview this report in BIDS I get the following errors. However, when I upload this report into CRM it works fine.
Please check following post :
http://ashwaniashwin.wordpress.com/2013/03/21/error-while-loading-code-module-microsoft-crm-reporting-rdlhelper-details-could-not-load-file-or-assembly-ssrs-error-on-crm-2011/
Hope this helps. If you get answer of your question, please mark the response as an answer and vote as helpful !!! Vikram Singh. !!! My Blog