run time error in asp.net page

hi ive developed an application using asp.net in web matrix with sql server , and it works fine on my pc , but when used on network from any other client machine it gives me a run time error , if i try to use any page without any database access it works fine but when i try to use an aspx page where database access is required it gives this run time error problem please kindly suggest me wat to do asap.
u can mail ur reply to me at ami_scorp@yahoo.com
cheers
Amit.