Date Validation In SQL Server

Hi There,

I have a software where the frontend is created in VB and backend is created in SQL server. Our HO sends a file, this file has only one month validity. It has 2 files one is parent and one is child file. while uploading the file using software it creates the following files

Clipboard Clip File, Cursor File, DBE file, EXM, GLB file, MOD File, SQL server subscription file, MTB file, PAT file, PSK file, PTD file, QCM file, QTY file, SEM file, SMO file,STR file, TOP file and a VLP file.This files uploads questions and answers in database. and in SQL Profiler it runs the following queries

select dbname from master ..syslogins where loginname =UPPER ( 'S' )
select convert ( varchar ( 10 ) , getdate ( ) , 105 ) from sysusers where uid =0
select convert ( varchar ( 10 ) , getdate ( ) , 105 ) + ' ' + convert ( varchar ( 8 ) , getdate ( ) , 108 ) from sysusers where uid =0
select convert ( varchar ( 10 ) , getdate ( ) , 120 ) from sysusers where uid =0
All of them returns date. But after this it throws error file expired. I dont understand from where it checks date. and which file contains questions and answers

Can anyone please tell me which file might contain date validation and how do i remove it. I can mail the files for your kind reference.

Thanking you and waiting for some kind replies


mystical