The standard Samsung driver on the P10 laptop using Windows XP didn't have an option to specify a WPA password to connect to a wireless access point, it was WEP only. It would see the network name but when you connected it didn't even prompt for a password, just went off for a think and came back saying the connection had reset and it was refreshing the network name list.
If you looked in the advanced properties and manually tried to create a wireless profile it only had Open, Shared and WEP as security options.
I uncovered a Samsung driver that updated from the original 7.42 to 7.6 but that was still way back when in 2002 and still no WPA support. There didn't seem to be anything newer and the only support download Samsung offered was a picture editor (way to go Samsung!). I did spot a mention linking the SEW-2001M to an Agere chipset so I followed that line of thought and Googled this site
latest Agere driver for Samsung SEW-2001M
ignore the most recent v8.22 driver - doesn't work with the Samsung - but jump straight to downloading the 7.82 driver. That one works and includes WPA encryption support :-)
To install, extract all the files from the downloaded ZIP file and put them somewhere handy like the desktop or make a C:\DRIVERS directory. Then go into Control Panel > System > Hardware > Device Manager. Expand the network adapters and right-click on the Samsung wireless adapter, choose Update driver and point it to the earlier desktop/directory where you extracted the files to.
Love it when a plan comes together :-)