1st.. Check for last version installed !
By Default: Add remove programs>Microsoft Sqleval 2000 (check if you have this delete it)
2nd. Check after you have deleted (or not have in add remove programs the microsoft sqleval 2000 then check your folder) C:\Program Files\Microsoft Sqleval server and delete it
then restart and try again
If you still have errors then run registry cleaner and restart your pc and try again