Spam Assassin Error II

[tinyforks]

From application log:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentOutOfRangeException: Length cannot be less than zero.
Parameter name: length
at System.String.Substring(Int32 startIndex, Int32 length)
at SpamAssassin.SAConfigFile.readLine(String line)
at SpamAssassin.SAConfigFile.readFile(String fileName)
at SpamAssassin.SAStandaloneSpamFilter..ctor(ITransaction transaction)
--- End of inner exception stack trace ---
at System.Reflection.RuntimeConstructorInfo.InternalInvoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean isBinderDefault)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at pleskcore.SingletonPrimitiveClassFactory.GetObject(Type requiredType)
at pleskcore.ClassFactory.GetObject(Type requiredType)
at pleskcore.Transaction.GetObject(Type requiredType)
at spammng.app.Main(String[] args)

Running Windows Server 2003; Plesk 7.5.6, Smartermail 3.0