error in big red letters: Server Application Unavailable

[alf]

I receive this error in big red letters when I try to see my aspx pages:

Server Application Unavailable
The web application you are attempting to access on this web server is
currently unavailable. Please hit the "Refresh" button in your web browser
to retry your request.

Administrator Note: An error message detailing the cause of this specific
request failure can be found in the system event log of the web server.
Please review this log entry to discover what caused this error to occur.



why ????

thanks, alf.

 

[Ken Cox [Microsoft MVP]]

What did the event log say?

Here's something to try:

http://authors.aspalliance.com/kenc/faq2.aspx

As a caveat, not this technique posted by an MS person:

"Basically, this is not recommended because it will make your system
vulnerable. By running the process as the System account this basically
means that if anyone were able to get control of this process they would
have all of the priviledges that SYSTEM would have on the server and as you
know it has many.
My suggestion would be to Create a weak account that has the correct
permissions, and then
configure the <processModel> section of the Machine.config file to use
that account.
Here are some simple steps you can follow to grant NTFS permissions.
Keep in mind that if you are running the 1.0 framework you will need to
replace v1.1.4322 with v1.0.3705
1. Create the domain user and grant it "Log on as a Service", "Log on as a
Batch Job", "Deny Logon Locally", “Access this Computer from the Network”
2. Add domain user to the local Users Group
3. Grant domain user read access to C:\Winnt\microsoft.net
4. Grant domain user Full Control to C:\WINNT\TEMP
5. Grant domain user Full Control to
C:\winnt\Microsoft.Net\framework\v1.1.4322\Temporary Asp.Net files
6. Grant domain user Read access
toC:\WINNT\Microsoft.Net\Framework\v1.1.4322
7. Ensure domain user has Read access
toC:\Winnt\Microsoft.Net\Framework\v1.1.4322\config
8. Ensure domain user has Read access to C:\Winnt\Assembly
Note: You should use the following command to add permissions to this
folder because it is a special folder and does not have a security tab
cacls c:\winnt\assembly /e /t /p domain\useraccount:R

9. Modify the
c:\winnt\microsoft.net\framework\v1.1.4322\config\machine.config under
<processModel> change these lines to read
Username="domain\user"
Password="password"
10. Restart IIS for the machine.config changes to take effect"