Why do you want to install another ipk from another image ?

rt3070_2.1.1.0-_dm800se_2.6.18-7.4.ipk

This one is not related to the image, and is Kernel 2.6.18... the current image is Kernel 3.2, it's also very important to know that you need to install the drivers from the feeds and not ipks found on internet from other images, that will for sure fail your installation.

Concerning your "not working", you should dm520 ? And your box is dm800hdse, is this correct ? I don't understand why you post the dm520 and not the dm800se log, to find out errors. I will try to do an installation on a dm800se to check, but on the dm520 it was successful. Can you please specify exactly what doesn't work, and did you tried the lsmod and lsusb commands to find out if all was properly installed ?

Thank you,

Admin