Link button don't work in FireFox and Internet Explorer

Can anyone help?

I have a gridview and two link buttons;back and previous to navigate back and forward the page is working fine on Opera but the link button is not active when using FireFox and Internet explorer.The code is as follows





























private int BindGrid(Int64 id, int currentPage)
{
int tp;
//UserDataSet.MessagesDataTable mt = MessageManager.GetMessagesByRecipient(id);
UserDataSet.MessagesDataTable mt = MessageManager.GetMessagesByRecipientPagedOldestFirst(id, currentPage, 10, out tp);

int numMessages = mt.Rows.Count;

//create a new datatable with minimal column ...