There could be only 3 problems:
1) You don't have (right) gproxy
You said you have gproxy v1.7.3, which is right one. You can check it in channel by writing !v.
Make sure you run gproxy before euroloader and use right gateway (eurobattle.net gproxy).
2) You are banned
You said you aren't banned. You can check it on Stats Page or in channel by !checkban.
3) You don't have a right map in right folder
I'm not sure what version is on bot. If you go to game list and click on some DotA game, you have to see a little loading screen at the right side. If you see just big ?, you don't have the right map, or you have it in wrong folder.