Weird export error from Maya

I have Maya 8.0 and I'm getting these errors trying to export using the Maya2DTS plugin and dtsUtility.

API Error Log Opened Wednesday, February 21, 2007 02:50:51 PM
Object is incompatible with this method
Method: findPlug
Class: MFnDagNodeObject is incompatible with this method
Method: findPlug
Class: MFnDagNodeObject is incompatible with this method
Method: findPlug
Class: MFnDagNodeObject is incompatible with this method
Method: findPlug
Class: MFnDagNodeObject is incompatible with this method
Method: setObject
Class: MFnReflectShaderObject is incompatible with this method
Method: findPlug
Class: MFnDagNode

I have read and gone through Danny Ngan's Maya tutorials (http://www.dannyngan.com/torque/maya2dts/tutorials/index.htm), but still no luck.

Any suggestions?

Thanks.