Link again with my code

Hello, I am a novice programmer (sorry if it is a stupid query) and I have started using bazzar to control the versions in Launchpad.

A friend prepared my computer with Bazaar Explorer, and so I could send the new versions to Launchpad.

But I changed computers and now I can not get it to work again.

I created a new SSH keys, and with Bazaar Explorer I got a copy of the branch. When I make changes to the code, it shows me the differences, but when I commit it returns this:

Run command: bzr commit -m "Versión 0.1.0. Depuración de código." data/agendie.desktop src src/AgenDie.gs src/AgendaNotebook.gs src/Dialogo.g...
bzr: ERROR: No se puede bloquear LockDir(http://bazaar.launchpad.net/~webierta/agendie/trunk/.bzr/branch/lock): Transport operation not possible: http does not support mkdir()

I do not know if it is a credential error or if the error is at the branch source (but I have tried multiple addresses and it does not work with any).

My project is: https://launchpad.net/agendie

Please, someone can give me some indication of how to do it. Thank you very much.