Do you have both the jstl.jar and standard.jar files located in WEB-INF/lib? Standard.jar contains the *.tld files which contain the URI that is being requested.
Thanks for the reply. Yes, I do have the JSTL libraries in WEB-INF/lib. I believe I know what the problem is, but I'm not really sure. My organization is using Flex Builder with JBoss as the host, and I am unable to use a normal server deployment procedure to load my work, but rather am having to try to load it on to a Flex site, as an exploded war nested inside of another web app. I don't believe that kind of arrangement will work, but if it is possible, I don't know what kind of configuration is necessary to make it work. I do not think the server ever looks at my WEB-INF, but rather uses the Flex configurations and context. If anybody knows how to make a situation like this work, I'd appreciate the info.