Interacting with IE tabs once opened - vba

Question

What I'm trying to do here is automate the opening of several helpdesk tickets simultaneously in separate IE tabs. I create a list of ticket numbers in Excel and then loop through the ticket numbers, opening each one.
My code seems to work fine when I open each one in a separate IE instance, but since I've tried to open them in separate tabs of one IE instance, I get an error on the second loop. Here is what I have so far:
Set Tickets = Sheet5.Range("a1", Range("a1").End(xlDown))
Set ie = New InternetExplorerMedium
ie.Visible = 1
apiShowWindow ie.hwnd, SW_MAXIMIZE
For Each Ticket In Tickets
If Ticket <> "" And Not Ticket Like "IM*" And Not Ticket Like "ARS*" And Not Ticket Like "C*" Then
'Load Mantis Page
If Tabbed = False Then
ie.Navigate "http://URL"
Else:
ie.Navigate "http://URL", CLng(2048)
End If
Do
DoEvents
Loop Until ie.ReadyState = 4
'LoginCheck
Set LoginExists = ie.document.getElementById("username")
If LoginExists Is Nothing Then
GoTo SearchForTicket
Else: GoTo Login
End If
Login:
Call ie.document.getElementById("username").SetAttribute("value", "xx")
Call ie.document.getElementById("password").SetAttribute("value", "xx")
ie.document.getElementById("login_form").Submit
Do
DoEvents
Loop Until ie.ReadyState = 3
GoTo SearchForTicket
'Search for Mantis ticket
SearchForTicket:
Application.Wait (Now + TimeValue("0:00:03"))
ie.document.All("bug_id").Value = Ticket
Set AllButtons = ie.document.getElementsByTagName("input")
For Each Button In AllButtons
If Button.Value = "Jump" Then
Button.Click
Exit For
End If
Next
End If
Tabbed = True
Next
It works the first time around, and opens IE, navigates to the page and searches for the ticket. The second time around, it opens the new tab and navigates to the page, but when it tries to search for the second ticket, I get an error saying:
Object doesn't support this property or method"
On line:
ie.document.All("bug_id").Value = Ticket
I've been searching for an answer with no luck so far. Any help would be appreciated.