Polymar - 2014-07-31

Sorry for my dumb questions but I'm fairly novice to this topics.
I got an Asus N55U Router running a Linux version under MIPS Arch. Asus delivers a MediaServer based on minidlna 1.1.0 and I'd like to update it to 1.1.3 (running it by myself, not using GUI provided from Asus). When I try to install the package, the system tells me that is unable to detect the correct architecture, so, no magic. What are the steps to compile it in order to generate an IPK package to install?

Thanks in advance for any help