Replace doesn't seem to work?

I have some code a bit like this:

Dim string1 as string
string1 = "some text"

Dim tempstr as string
tempstr = Replace(string1,"xt","ab")

string1 = tempstr


Now I believe string1 should be "some teab", but in fact it is unchanged.
What can be wrong?
I must add, that I haven't touched vb for more than 10 years, so I'm feeling my way into the syntax again...

The code works ok

Code:

---

Dim string1 As String
Dim tempstr As String
    string1 = "some text"
    tempstr = Replace(string1, "xt", "ab")
    string1 = tempstr
    MsgBox string1

---

Yep what you have shown would work, if that is your actual code then how are you checking string1 to see what the value is? If that is not the actual code then be sure to keep in mind that many string functions are case sensitive by default.