网站在本地执行正常发布到服务器有部分页面出错--求解

.Net网站在本地执行正常发布到服务器有部分页面出错,可以为Null的值都做了处理还是不行。应该不是数据的问题，这是为什么呢？
报错信息如下：

ServerErrorin'/'Application.

RuntimeError

Description:Anapplicationerroroccurredontheserver.Thecurrentcustomerrorsettingsforthisapplicationpreventthedetailsoftheapplicationerrorfrombeingviewedremotely(forsecurityreasons).Itcould,however,beviewedbybrowsersrunningonthelocalservermachine.
Details:Toenablethedetailsofthisspecificerrormessagetobeviewableonremotemachines,pleasecreatea<customErrors>tagwithina"web.config"configurationfilelocatedintherootdirectoryofthecurrentwebapplication.This<customErrors>tagshouldthenhaveits"mode"attributesetto"Off".

<!--Web.ConfigConfigurationFile--> <configuration> <system.web> <customErrorsmode="Off"/> </system.web> </configuration>

Notes:Thecurrenterrorpageyouareseeingcanbereplacedbyacustomerrorpagebymodifyingthe"defaultRedirect"attributeoftheapplication's<customErrors>configurationtagtopointtoacustomerrorpageURL.

<!--Web.ConfigConfigurationFile--> <configuration> <system.web> <customErrorsmode="RemoteOnly"defaultRedirect="mycustompage.htm"/> </system.web> </configuration> 是代码问题还是服务问题？如果是服务器问题为什么只有少数页面报错呢