I have created a HTLM window which is opened when I run a test. This window includes 2 textboxs for the user SAP and the password.

When I run a test with windows XP, I have got no problem but I do the same thing with windows VISTA, I have got a problem with the value which are entered in the textbox.

The string 12345678 was typed into the User ID and the password fields. As you can, some characters do not appear in the fields. This always happens, but it is random which characters are missing each time.
For this time, the are only the value <24578> which are entered in the User SAP textbox.