Where are you getting this error on , a PIX, VPN concentrator or something else???
IF you are seeing this on a IE browser then:
HTTP Error 414
Request-URI Too Long: The server is refusing to service the request because the Request-URI is too long. This rare condition is likely to occur only in the following situations:
A client has improperly converted a POST request to a GET request with long query information.
A client has encountered a redirection problem (for example, a redirected URL prefix that points to a suffix of itself).
The server is under attack by a client attempting to exploit security holes present in some servers using fixed-length buffers for reading or manipulating the Request-URI.
Please contact the Web server's administrator if this problem persists.