Edimax 7811un wifi dongle problems

having problems installing the edimax-7811un wifi usb dongle… have installed all the firmware for the 8192cu, then tried the 8192su etc which apparently will work for the 7811 from angstroms website- I installed the packages “kernel-common” and “linux firmware” for both…they install fine but iwconfig still shows nothing

when i try to compile the linux driver from the edimax website i get this error

make: *** /lib/modules/3.2.5+/build: No such file or directory. Stop. make: *** [modules] Error 2

What is annoying me is that I KNOW this dongle works as there are pictures of it working but I am just being a doofus…

I am a linux newb so please could some kind person be very patient with me and walk me through how they got it working… or what the error code means?

Thanks a lot!