I love how people keep putting new hardware in old xp systems... bassfisher6522 is right in that a new install of xp will be required to make this work correctly.
option 1: download the xp drivers for the ssd... (not a bios flash). Then install xp, note that xp won't detect the ssd because there was no such thing 10 years ago so it will say press a key to install third party drivers and thats what you will have to do.
option 2: put the old harddrive back in and run xp on that, then install windows 7 or Ubuntu i.e. something up to date, on the ssd as the 1st boot... this allows you to use the xp for old games and such but the new system for internet banking and is what I would do!