Button cant working properly

[Brando]

I am working on visual studio 2010 with SQL Server Management studio.I have made a button for deleting selected rows from the table.\[code\]<asp:Button ID="btnDeleteSelectedMessages" runat="server" Text="Verwijderen" Enabled="false" OnClick="btnDeleteSelectedMessages_Click" />\[/code\]It works perfectly for the first time when I run the page first time.then after the button can't be clicked second time.the code on button click event is like this.\[code\]protected void btnDeleteSelectedMessages_Click(object sender, EventArgs e){ if (currentGridView == null) setCurrentGridView(); //controleer voor elke rij welke checkbox is geselecteerd foreach (GridViewRow row in currentGridView.Rows) { var cb = (HtmlInputCheckBox)row.FindControl("chkPaid"); Guid messageID = (Guid)currentGridView.DataKeys[row.DataItemIndex].Value; //als de checkbox is geselecteerd het bericht verwijderen if (cb != null && cb.Checked) { if (currentGridView.ID.Equals("Messages")) b.BussinesMessageReceiver.DeleteMessageReceiver(messageID, MessageBoxPerson); else if (currentGridView.ID.Equals("MessagesSent")) b.BussinesMessage.DeleteMessageSender(messageID); else //MessagesDeleted b.BussinesMessage.DeleteMessage(messageID, (Page.Server.MapPath("~/Upload/") + messageID)); continue; } } btnDeleteSelectedMessages.Enabled = false; selectLocation.Visible = false; clearSelectedMessageSession(); //Update the GridView BindGridView();}\[/code\]Can any one help me?