I have some difficulties to display runtime errors in SharePoint, even if my web.config looks fine :
I have set:
<compilation batch="true" debug="true" optimizeCompilations="true">
Do you have any idea where the problem comes from ?
Thanks
Things changed a little between SharePoint 2007 and SharePoint 2010. Greg discusses the steps that are required to get detailed error messages in the following post:
http://www.greggalipeau.com/sharepoint-2010-customerrors-mode/