Networking :: TCP/IP speed

I have a problem...
my network speed between Windows and DamnSmallLinux just 400Kb/s is any way to increase it?
1 Windows XP SP2 (wireless connection 54Mbit/s)
2 DamnSmallLinux 2.2 (cable connection)
3 Router Dlink DI-524

Any help is greatly appreciated!

original here.