Plugin not run plz help!!!

hi have good time plz help me . i download wordpress 2.7 and upload host and installed in host.i upload Plugin and installed.no installed Plugin and pm me warning this warning in image plz look image and plz helppppppppppppppppppppp me.tanx

http://img3.imagebanana.com/img/vexumdmn/plzhelp.GIF
http://img3.imagebanana.com/img/vexumdmn/plzhelp.GIF