Restoring Transaction log

Hi everyone,
First off, any help will be appreciated.
The scenario is that a chunk of data from one of the tables in a
database have been mistakenly deleted. I have done a complete backup of
the database and the backed up the log. I attempted restoring the
Database first with teh Norecpvery option and that worked. when I tried
restoring the log file with the STOPAT clause I get an error. I am
reproducing the script at the error below. Please help if you can
'Restoring the Database - Successful, with message shown below
RESTORE DATABASE MatriEdu2006
FROM DISK = 'C:\EducMatri06.db' WITH NORECOVERY,
MOVE 'EduMatri_Data' TO 'C:\MatriEdu2006.mdf',
MOVE 'EduMatri_Log' TO 'C:\MatriEdu2006.ldf'
Processed 920 pages for database 'MatriEdu2006', file 'Edu_Data' on
file 1.
Processed 1 pages for database 'MatriEdu2006', file 'Edu_Log' on file
1.
RESTORE DATABASE successfully processed 921 pages in 1.114 seconds
(6.766 MB/sec).
'Restore Log - Failed, with error message shown below
RESTORE LOG MatriEdu2006
FROM DISK = 'C:\EducationMatrix_Log'
WITH RECOVERY, STOPAT = 'Dec 11, 2006 03:14 PM'
Server: Msg 4326, Level 16, State 1, Line 1
The log in this backup set terminates at LSN 537000000112000001, which
is too early to apply to the database. A more recent log backup that
includes LSN 553000000066000001 can be restored.
Server: Msg 3013, Level 16, State 1, Line 1
RESTORE LOG is terminating abnormally.>> On 12/10/2006 at 5:40 PM, in message
<1165797639.616739.281890@.80g2000cwy.googlegroups.com>,
highflier<nbarnard@.au.loreal.com> wrote:
> Server: Msg 4326, Level 16, State 1, Line 1
> The log in this backup set terminates at LSN 537000000112000001,
> which
> is too early to apply to the database. A more recent log backup that
> includes LSN 553000000066000001 can be restored.
> Server: Msg 3013, Level 16, State 1, Line 1
> RESTORE LOG is terminating abnormally.
You need to find a full backup made *before* the data loss, along with
all the logs made between that full and the time of the data loss.