MBP can't find one specific wifi network.

The hotel where I live offers free wifi (The Cloud) and for months I've been using with full signal.

Suddenly my MBP (mid 2010) was unable to find this network.

My iPad and my iPhone (and friend's devices) are still connecting at any time with perfect full signal.

I've tried holding alt+cmd+P+R at boot to reset PRAM and NVRAM but it still can't find that specif wifi network.