kvillaca,
Could you try the following –
1. Open MyEclipse IDE, from menu options click on Window > Preferences > MyEclipse > Maven4MyEclipse
2. On the right hand pane, uncheck and re-check the checkbox preceding “Enable Maven4MyEclipse features. Click on [Apply] and [OK].
3. Right click on your project and click on MyEclipse Maven > Enable Dependency Management and follow the wizard.
4. Next right click on your project and click on Maven4MyEclipse. Here you can add dependencies, etc
Let me know how this works for you.