asp vbscript error handling

Hello Experts,

I am trying to capture a common error in an asp page written in vbscript.  The page allows users to delete a record in a database.  There is a foreign key constraint that keeps users from deleting values that are used in the contraint.  Attempting to delete a record gives this error message:

Microsoft OLE DB Provider for ODBC Drivers error '80040e14'

[Microsoft][ODBC SQL Server Driver][SQL Server]DELETE statement conflicted with COLUMN REFERENCE constraint 'FK_age_resource_age'. The conflict occurred in database 'bmrc', table 'age_resource', column 'age_id'.

/bmrc/admin/catalog/age_detail.asp, line 76

So...

I added the following code to capture the Err.number value

on error resume next
     MM_editCmd.Execute
     'trap errors on delete
     IF err.number <> 0 THEN
          response.Clear()
          Response.Write(Err.number & "<br>")
          Response.Write(err.source)
          response.Write(err.description)
          response.End()
     END IF

This results in the following error page

-2147217900
Microsoft OLE DB Provider for ODBC Drivers[Microsoft][ODBC SQL Server Driver][SQL Server]DELETE statement conflicted with COLUMN REFERENCE constraint 'FK_age_resource_age'. The conflict occurred in database 'bmrc', table 'age_resource', column 'age_id'.

So...

I then edited my code to catch this specific error and tell users to delete the related records

IF err.number <> 0 THEN
     'trap cannot cascade delete
     IF err.number = "-21477217900" THEN
          Response.Clear()
          Response.Write("The age you are trying to delete is still in use. <br> Please remove all related records")
          Response.End()
     ELSE
          response.Clear()
          Response.Write(Err.number & "<br>")
          Response.Write(err.source)
          response.Write(err.description)
          response.End()
     END IF
     END IF
The if err.number = "-21blah" never fires the else always fires.  I also tried if err.number = -21blah without the quotes and the same thing occurs. What am I doing wrong ??

Thanks,

anorglet