help need urgently ive killed my forum

[Rickie3]

hi all i'm in a real pickle here,i had a online user hack installed as detailed:::::Hack Who was online last 24H by CXII & svaliotti adapted by Mtor

final version (vBulletin 3 rc2)

but when i hit the uninstaller above it killed my forum this is the error i get;;;;;
-----------------------------------------------------------------------
Database error in vBulletin 3.0.3:

Invalid SQL: SELECT userid FROM sg_usersonline WHERE userid=1
mysql error: Table 'satsfge_.sg_usersonline' doesn't exist

mysql error number: 1146

Date: Wednesday 26th of October 2005 06:04:51 AM
Script: http://www.sats-general.com/forum/index.php?

the reason i wanted to uninstall is i wanted to use this hack,,,,Paul Marsden - Simple hack to display members who have visited the forum today.Please can someone help me,i should have just left things alone