I have just installed UT3 in my computer but when I try tu run, this show this message:

UT3.exe ha detectado un problema y debe cerrarse.

Do you have any idea?

My compuer
Windows XP Profesional SP2
Pentium 4(R) CPU 3.0 GHZ HT
1.5 GB RAM DDR 1
ATI Radeon 9250 With last Drivers Instaled
Resolution 1280x1024
HD Maxtor 60GB

UT
CD LABEL UT3_RC7