Quartus 12.0 programmer stops at 63%

Hi,
I'm currently using Quartus 12 Web 32bits edition on a 64bits-Windows and i'm aving troubles with the programmer.

I build the sof file without problem. Somehow, when I program it to the board, the progress bar stops at 63% and the programmer is freezed. I want to program a Cyclone-IV fpga. I can't find anything on the internet or this forum :(
I don't have any error message.

Thanks