Thanks for the confirmation.
> what happens when you use Internet explorer as the client instead of Jmeter > , do you not see a similar problem? > > But both IE and Firefox are not changing the case of the username to uppercase. Infact, if they are converting the username case, then the application would have been forced to convert it. But can you point me to the source code, where i should change in order to avoid this issue for now? Thanks a lot, Gokul.