Guys help me tell me what the error is............ the xxxxx for the link is my site url i changed it. Well can someone know what exactly the error is and why is it so and how to rectify it.

You did not post the error though. Right click page and click view source. Then paste the full error here.

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well this is what it keeps sending me emails i keep getting emails like 60-100 per day with the above message.

what hacks do you have installed?

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vBulletin 3.6.0
AdminCP Top 10 Statistic 1.00
Bottom Navbar 1.0.5
Color Groups Home Page 1.00 group color home page
Cyb - Attention Zero-Posters 1.3 Cyb -
Cyb - Check If Already Posted 1.4
Cyb - Forumhome Sub-Forums Manager 2.1 Cyb
Cyb - Top Posters In Month X 1.0 Cyb -
Cyb - Visitors in Last X Hours 2.0 Cyb -
Cyb PayPal Donate 1.5 Cyb PayPal Donate
Donation Graphic 1.0.1 ProgressBar
ecDownloads 4.1
EWT - eXtend Show Spider 1.0.0
Global Announcement 1.2
ibProArcade for vBulletin 2.5.5
Inviter Addon 1.0
Last Seen Online (Postbit) 2.0
Lates 5 Attach Admin index 1.02
most popular forum home 1.01
nCode Image Resizer 1.0 RC 2
Nova Awards 1.10
PM Moderation 1.0
Post Thank You Hack 5.3
Prevent Spam 1.0
Profile Comments System 1.0
put a response to appear component 1.00B2
Refer Friend 1.0 Refer to friends
Separate Sticky and Normal Threads 1.0.3
Shoutcast Status Forumhome 2.0
Top 'X' Stats by InfiniteWebby 1.2.2 Display top 'X' posters
vB Category Icons 1.0.1
vbDonator 1.1.0 PayPal Donations
vBGuides: Seasonal Effects 1.0.0
VBHoroscopes 3.5.x
vBookie 1.0.7 vBulletin Betting Hack
vBSEO 3.0.0 VBSEO
vBSEO :: Conditional Signatures 1.4.2
vBShout 2.0
vJukebox 0.9.0 Alpha
[Sniper] - Mood Manager 1.2.3

THESE ARE THE HACKS INSTALLED

Most likely caused by one of the addons.
Disable them one by one and see if the error still shows up.

To disable them all at once you could also do the following:
To temporarily disable the plugin system, edit config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

Which of these have a hook for forumdisplay_ ?

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well this does not show up when you browse this is the error message being the administrator i recieve as emails. And the email msg is posted on top. Well i would want to know exactly which hack to disable all at once wouldnt solve my problem.

then disable them one by one, until you find the one causing the error. Not that hard eh ?