I'm running on XP and havn't got a floppy drive. I tried to run it with and without dosbox but it always complains about that I don't have got enough memory avalible to run it(I believe that I have enough memory avalible!).

Any ideas?

Your problem description is insufficient for us to provide a proper answer. Please post the exact content of the error message.

well, not you can write more info and what exactly does the message say but try opening dosbox.conf and find lines "xms", "ems", and "umb" and make sure that the value is true.
also, find "memsize" and try raising its value.

as for the windows, when you click properties of the excutable and in memory tab set everything to maximum