i have got a master chess computer from mephisto i got it at christmas its got 64 levels and i have only beaten it 4 times on the very low levels i no computers are good but im getting fed up with getting a beating most of the time does anyone have the same problem as me. my rating on chess . com is always 1550 to just over 1600 and i much like playing humans to computers.

I've got a Novag Obsidian, and although it's not as strong as your Mephisto, I can definitely empathize.  :)

The Mephisto has a power-saving mode that allows you to turn off the "permanent brain" (so that the computer doesn't think during your move time).  It also prolongs battery life.  You might want to check that option, because if the computer is thinking during your move time, it makes a lot of the lower levels (based on reducing the machine's think-time) a bit meaningless.

I play the lower levels shamelessly too.  It's still a pretty darn strong game of chess.  I break out the Obsidian when I want a quick game with a more tactile, 3-d chess experience than I can get from my LCD, and I don't worry too much about the level, as long as I've got a reasonable chance to win if I play my best.

I downloaded Sigma Chess Lite for my Mac. I had to tone it down just to even have a chance to beat it. Playing humans is far better than computers, because humans make blunders.

I have several chess computers. NY Times Saitek handheld, Saitek Mephisto Maestro handheld. I play them for practice when I'm on trips or in boring meetings - I suggest you sit in the back if you do that I play mid-levels and 30 min./game. If I take longer than 30 min, and I win the game, I count is as a win. Works good I win some, I take back bad moves, then win in others. If the computer gets a big advantage - I turn it off and scold it explaining that I'm the boss and it won't play chess if it doesn't let me win a lot of games. I give it a half hour of no chess then play it again just to see if it understands.

Remember, it's only a computer - you can't cheat it! If it gets a big advantage - hit reset and start again. You obviously need work on your opening so no point in continuing. Keep playing the early part of the game until you to come out on top. Then work on the middle game the same way. You're goal is practice so that you can improve your score here at chess.com.