ASP.NET Web Site Setup

Today I try to setup a ASP.NET web site which was developed by a previous colleagues. After I have finished to prepare all the things (Setup in IIS, registery modification, etc..) according to the description in the setup document, I try to access the site but it reports error message of "failure to load XXX.DLL"

I modify register to enable "Fusion!EnableLog" and make sure the DLL has been stored in both of "\bin" of the web site and subdirectory of "Temparoary ASP.NET Files" but the problem is still there.

Finally I modify "security setting" of "Temporary ASP.NET Files" and allow "Internet Access Account" to access the folder. The problem is solved after I have added the access the folder. BTW, not certain whether it will cause security loophole or not.