The statement BACKUP LOG is not allowed while the recovery model is SIMPLE
If you received this error message: "[Microsoft][ODBC SQL Server Driver][SQL Server]The statement BACKUP LOG is not allowed while the recovery model is SIMPLE"
You need to change the Recovery model to FULL. If you are using Microsoft SQL Server 7.0/2000, please refer to the following MSDN article:
1. http://msdn.microsoft.com/en-us/library/aa173678.aspx
Alternatively if you are using MSDE (Used by some desktop applications), please issue the following commands:
osql -E -S [Server Name] -Q "ALTER DATABASE [Database Name] SET RECOVERY FULL"
These will enable transaction logging option for your MSDE databases and allow incremental/differential backup to be run properly.