I'm using http://www.midoblesim.com/product_info.php?manufacturers_id=&products_id=483 and i can't install skype.It says that it's not matching, but still it is downloading it from the market. I gived you that link becouse this isn't an original, android phone, it's some Chinese stuff. But however, how can i solve the problem and install skype and run it correctly ?
According to the web page that you linked, your phone has the following specs:
The Skype FAQ says:
So it looks like the app doesn't support your phone's CPU (which oddly seems to be slower than the very earliest Android phones like the G1).
There is more than one official Skype app, it's possible that the one you're using isn't compatible with your phone, but another one might be. See the links in this question to find the Skype apps Can I install Skype on my xperia?