Unable to install new packages on rb750gr3

Hi have a mikrotik rb750gr3 and I was interested on trying to get iptv using the multicast package. However, I can’t install new packages. I’ve copied the package to the home directory (where the skins folder is) and on reboot the router doesn’t do anything. The logs also don’t show anything about the package. On my router the files appear as flash and flash/skins, for example, and I’ve seen that on other routers it just says skins as a main directory (don’t know if that means anything). I’ve also tried putting the package on the actual root, but that just ended up bricking the router, from which i recovered. I’ve checked and I’m sure it is the right package (from the allpackages for mmips version 6.41.4).

http://forum.mikrotik.com/t/hex-package-installation/109000/1