Power On and Sleep Problems!

So, my MBP is a mid 2010 13", C2d 4gb ram 250GBHDD nVidia 320m.

Slept for 2 months (I went to a trip and thougt it was off, but it was sleeping).

Now, If it goes to sleep, right after it wakes, it turns OFF (with or without cable and/or battery).

To power on, I have to hold de power button until it starts flickering and then it chimes and carry on to the OSX.

If I press the power button just once (normal), it lights up, HDD starts spinnig and then turn off.

I also have another problem, which is Airtport not detected,

it was working after the sleep problem, but now, suddenly it stoped. but this is a small problems.

WHat i`ve tried already:

PRam reset (2 times in a row)

Ram change (2x2GB).

Tried each module in each port (2GB). and nothing changed.

If i triy to boot without memory, is does not turn off, simple beep (lacking the memory offcourse).

Tried SMC Reset, but I think it did not worked, soon to try it again.

Now I`m going to disable the internal keyboard/power button and try to boot it shorting it out plus an external keyboard.