I just finished installing mandrake and first it was fine.
since I connected it to the internet everything work really slow for me. That means when I open a windows for any utility (word processing,linux configiruation utility and so) it takes few very long seconds untill it opens.

I tried to check memory. I have 1024MB RAM and also checked the swap with the linux system monitor I found that it doesn't use all the RAM and doesn't use swap at all.

any ideas ?

Does your hard drive appear to do nothing for the first few seconds? Try rebooting without connecting to your network and see if applications load faster. If so, check your /etc/hosts file for the following line:
127.0.0.1 your_local_host_name

For example, my cable company gave me a long name like CPE00207*********. I put that in there and now my apps aren't as slow any more.

?

When you start an application, does your hard drive appear to do nothing for the first few seconds? Try rebooting without connecting to your network and see if applications load faster. If so, check your /etc/hosts file for the following line:
127.0.0.1 your_local_host_name

For example, my cable company gave me a long name like CPE00207*********. It's the string of characters in my bash prompt after my user name. (e.g. root@CPE00207...) I put that in there and now my apps aren't as slow any more.

If the line is not there, add it.