it write only gproxy. you must have 2 gproxy.txt in 1 of them writes the things you have posted in another is complete log.
edit: before you post gproxy log try next:
take a copy of warcraft from your friend (complete folder from c
rogram files) and paste it inside your computer. after you have done that click 2 times eurobattle.reg icon (and press yes). After that you should be able to log into bnet.
also check does your antivirus blocking warcraft (i mean gproxy.exe) cause sometimes that can be also the reason.
that simply MUST work.