Passing Variable To Two Macros?

I have the following code in 'ThisWorkbook':

VB:
Private Sub Workbook_Open()
Call Meetdata
End Sub

It calls this macro which is in a standard module:

VB:
Public firstvariablename As String
Public secondvariablename As String
Sub Meetdata()
regionname = InputBox("Enter the name of the Region.", "Region Name: North, South, East, West")
meetdate = InputBox("Enter the date of the Meet.", "Date of Meet")
End Sub

This set-up should make the variables available to all the other macros in the workbook. I have two other macros that need to use the values stored in these two variables that are entered into the two 'InputBox' statements. These two macros are in the same module and follow the 'Meetdata' sub. When I run the first macro, it recognizes the variables. When I run the second macro for some reason the variables are not recognized. To test the values returned by the variables, I placed the following code at the end of the first macro and again at the beginning of the second macro .

VB:
MsgBox(firstvariablename & " " & secondvariablename)

At the end of the first macro, the MsgBox returns the correct values stored in the variables which means that when the macro completes its run, the variables still hold their values. When I run the second macro with the MsgBox at the beginning, the Msgbox returns a blank. Somehow, the variables have been re-set to a null value. I can't figure out why the variables have been re-set to null. [URL]