Jehan,
Sorry that you are seeing this issue.
Can you please update your MyEclipse for Spring to our latest version 10.6 and check if you can still replicate the issue ? Go to Help > MyEclipse Configuration Center > Software > Software Updates Available. Select MyEclipse Enterprise Edition 10.6, apply the changes,follow the wizard and restart the IDE when it prompts.
For hot deployment to work please make sure that you are starting the server in Debug mode. Also, make sure that “Project -> Build Automatically” is switched. Hot code replacement works (only?) if automatic build is switched on.
Let us know how it works for you.