No Wi-Fi on Macbook Pro 13'' (Mid 2009)

Hi, I have a Macbook Pro 13'' mid 2009. I've done every update since I bought the Mac.

I've been having huge problems with the wi-fi on the Mac lately.

Every time I restart the Mac, the system does not load the wi-fi. Nor do I see e.g the battery power and other

Items don't load either. I have to restart the Mac several times 10 to 15 times until the wi-fi signal is shown on the login screen and all the other things work again as well.

I had this problem as well on Lion.

My question is, what could be wrong and how can I fix the problem?

Help would be appreciated...or does anybody have the same problem?

Thanks!