Nested While Loops Not Executing

I have the following situation:

    j = 1
    i = 1
    Do While j <= 5
        Do While i <= 5            
            MsgBox CStr(i) & ":" & CStr(j)
            i = i + 1
        Loop
        j = j + 1
    Loop

and it appears to only run through the inner loop once and then exits both loops. Are nested loops not possible in VBA?

Thank you for your time,
Brandon