Redmine

hello guys,

i've redmine 2.0.3 installed on windows 2008 R2 it's working good but i found this error (500 - Internal server error.There is a problem with the resource you are looking for, and it cannot be displayed)happened when i try to delete an project. i also put the user in admin group in redmine but also same error. i checked the log but didn't give me specific thing, so how can i fix this error????

thanks