WIFI Access WEP but not WPA-PSK

Hello can anyone help?
I have an Ipaq with pocket pc 2003 pro which I am trying to connect to my home wireless router which has WPA-PSK security.(it has a WEP security option also but chose to use WPA-PSK)
When I go through the connecions set up on my IPAQ there only appears to be a WEP security option to select? and not a WPA-PSK option.
Does this mean I cant connect my IPAQ?
I suppose I have the option of changing my router security to WEP but dont want to do this.
Would there be newer pocket PC software availabe or any upgrades that would have the WPA-PSK security option and where would I get it?
Thanks
numlock

[getsurfers]

WPA is in WM5, but not 2003.

HP may, however, have a patch which enables this. I'd ask HP, or look on their support forums.