"Entry Point not found" error message ...

Hello!
I hope someone can help me. when I try to burn a playlist or CD from iTunes (using windows vista) i receive this error message about half way through the disc burn "The attempt to burn a disc failed. An unknown error occurred (4450)" and burn cancels. On start up I receive this error message: " Itunes helper.exe - Entry Point not found. The procedure entry point sqlite3_prepare_v2 could not be located in the dynamic link library SQLite3.dll"
How do I fix this? and is the reason why I cannot burn CDs?
Thanks!

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