SBS Computer Management Console Snap-in Problem

We just installed a new SBS server using the customers Open license. It is SBS 2003 Prem., but did not install premium technologies cd. The promblem is the company website displays an error and cannot be opened and so does in computer management the backup utitlity and the monitoring and reporting. Aslo, remote web work place does not function. Exchange and everything else work great. I have done many SBS installs and neve seen this. I am sending the error that I get when I open the SBS backup under computer managemnet console. I am assuming all problems are related? Any help on this will be greatly appreciated!
Thanks!

Server Error in '/Backup' Application.
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The current identity (NT AUTHORITY\NETWORK SERVICE) does not have write access to 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: The current identity (NT AUTHORITY\NETWORK SERVICE) does not have write access to 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace:


[HttpException (0x80004005): The current identity (NT AUTHORITY\NETWORK SERVICE) does not have write access to 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.]
   System.Web.HttpRuntime.SetUpCodegenDirectory(CompilationSection compilationSection) +3591451
   System.Web.HttpRuntime.HostingInit(HostingEnvironmentFlags hostingFlags) +222

[HttpException (0x80004005): The current identity (NT AUTHORITY\NETWORK SERVICE) does not have write access to 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files'.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +3540923
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +69
   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +275
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Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832