ASP.NET 3.5 EXPERTS ONLY I HAVE A PROBLEM ON MY SITE

you must be an expert at sql server 2005 and VB. AND ASP.NET 3.5 i will only talk to the developer working on the project. no group efforts. Must have teamviewer. MY web site is showing a "server error" the page should never present a "server error" or "hang" in this way. i need this fixed NOW please view the site at [login to view URL] enter *booking id 345* and *sitting id 6793CY* **TO SHOW HOW THE PAGE SHOULD LOOK WHEN PRESENTED CORRECTLY **enter *booking id 366* and *sitting id 9276LR* **TO VIEW THE PROBLEM **enter booking id 371 and sitting id 5870TD **TO SHOW THE CORRECT ERROR MESSAGE WHEN A USER TYPES THE WRONG NUMBERS ACCIDENTALLY. THIS ERROR MESSAGE SHOULD SHOW IF IMAGES ARE UNAVAILABLE OR USER TYPES WRONG NUMBERS **