I think it may be finding your struts.xml file but the app is having trouble loading it. This could be a problem with permissons or an error in your .xml file. Is there any more information in your log about this? Like an error stack?
I did that in another way and got it running. I zipped the entire folder and imported in eclipse (Running on Tomcat 6) and got it working. Not sure why it was not working when i did it manually(getting the *.war and deploying on GlassFish.)