Justin,
If you can telnet or console into the router, you will want to verify that the "ip http server"/"ip http secure-server" or "http server"/"http secure-server" (depending on the firmware) are in the configuration. You will also want to verify that a username and password have been configured with the following syntax:
router(config)#user <username> password <password>
If you want you can post your configuration to this thread for us to look at. Please remember to remove any sensitive information.
Let us know if you have any questions.
Thanks,
Noor