Can't open data directory on rooted android phone

I just rooted my phone because I need acces to the database my application is uisng. However, even though my phone is rooted, I still can't open the data folder in Eclipse File Explorer.

Is there something I've forgotten? Do I need to tell Eclipse I'm a superuser or something? I can acces the data folder on the emulator, but not on my actual device.

And I really want to develop on my device, the emulator is much slower and I can't get the internet connection to work.

Any ideas?